37150
2016
eng
265
272
4
71
article
Elsevier Ltd.
0
--
--
--
Niobium carbide for wear protection - tailoring its properties by processing and stoichiometry
Niobium carbide is a hardly explored carbide but its functional profile shows a high potential for wear protection and tribological applications, which are currently dominated by tungsten carbide. Surprisingly little information is available on niobium carbide (NbC). Niobium carbide can be either synthesized by carbothermal conversion of Nb2O5 or be metallurgically grown and leached out. Furthermore, NbC hardmetal grades can be bonded by all known metallic binders and processed and sintered in exactly the same way as WC-based hardmetals. Niobium is today largely available. NbC can be efficiently produced, provides comparably low friction in many relevant tribo-contacts and displays low wear. NbC and Nb2O5 have so far no REACH classification related to human toxicology and are not listed as substances of very high concern contrary to WO3 and Co3O4. This contribution demonstrates the key characteristics of NbC and discusses its sustainability and reliable value chain.
Metal Powder Report
10.1016/j.mprp.2015.12.010
0026-0657
Mathias Woydt
H. Mohrbacher
J. Vleugels
S. Huang
eng
uncontrolled
niobium carbide
eng
uncontrolled
wear
eng
uncontrolled
machining
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
31974
2015
eng
418
426
48
article
Elsevier
1
--
--
--
Microstructure and mechanical porperties of NbC-matrix hardmetals with secondary carbide addition and different metal binders
NbC has a relatively high hardness (19.6 GPa) and melting temperature (3600 °C) and is usually applied as a grain growth inhibitor in WC–Co hardmetals. The current study reports on the influence of the sintering technology and overall chemical composition on the microstructure and mechanical properties of NbC-based hardmetals, using Co as a binder. The partial replacement of NbC by 5 wt.% WC, Mo2C, VC or TiC allows one to significantly improve the hardness and toughness of the NbC–Co materials. The influence of different binders, i.e., Co, 316L stainless steel and Fe3Al on the microstructure and mechanical properties of NbC-based hardmetals was also investigated. The powder mixtures were sintered in the solid state by PECS and liquid state by conventional vacuum sintering. Detailed microstructural analysis was conducted by EPMA elemental mapping and WDS point analysis. Mechanical properties, including Vickers hardness and indentation toughness were assessed.
International journal of refractory metals & hard materials
35032
10.1016/j.ijrmhm.2014.10.014
0263-4368
0958-0611
17.11.2014
S.G. Huang
K. Vanmeensel
H. Mohrbacher
Mathias Woydt
J. Vleugels
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Sintering
eng
uncontrolled
Grain growth
eng
uncontrolled
Microstructure
eng
uncontrolled
Mechanical properties
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
37891
2016
eng
1
7
conferenceobject
0
--
--
--
Influence of VC and Mo2C on the microstructure and mechanical properties of Ni bonded NbC-cermets
The current study reports on the effect of VC and Mo2C carbides on the microstructure and mechanical properties of Ni bonded NbC cermets.
World PM 2016
ISBN 978-1-899072-47-7
World PM2016
Hamburg, Germany
09.10.2016
13.10.2016
S. G. Huang
J. Vleugels
H. Mohrbacher
Mathias Woydt
eng
uncontrolled
Niobium carbide
eng
uncontrolled
NbC
eng
uncontrolled
Liquid phase sintering (LPS)
eng
uncontrolled
Hard materials
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
37833
2016
eng
65/1
65/14
conferenceobject
Gesellschaft für Tribologie e.V.
0
--
--
--
Substitution of tungsten carbide by niobium carbide as cutting materials and for wear protection
Im binären System NbC-C existieren verschiedene Phasen im Homogenitätsbereich NbCₓ, mit 0,75 ≤ x ≤ 1,0, wie NbC, Nb₆C₅ und Nb₄ C₃ , die ein breites Prozessfenster beim Sintern und in der Werkstoffentwicklung ermöglichen. Die Mikrohärte, die Warmhärte, der Verschleißwiderstand, das Elastizitätsmodul und die Zähigkeit von Hartmetallen hängen vom C/Nb-Verhältnis ab, wie auch von der Zugabe von Sekundärcarbiden.
Several phases, like Nb₄ C₃ , Nb₆C₅ and other short and long range ordered phases occur in the region of homogeneity of NbCₓ (0.75 ≤ x ≤ 1.0) in the binary phase diagram. Properties, like micro-hardness, hot hardness, sliding wear resistance, elastic modulus and toughness can be tailored by the C/Nb ratio, the addition of secondary carbides and the type of binder. Supporting results from different grades with varying C/Nb ratio or binder types were illuminated. Thus, the NbC system offers to producers a wider process window, than WC. The impact of these tailored properties on sliding wear and cutting performance was illuminated by tribological and machining results.
Niobium is today largely available. NbC can be synthesized by carbothermal conversion of Nb₂O₅ or be metallurgically grown and leached out, provides comparably low friction in many relevant tribo-contacts and displays low wear. NbC and Nb₂O₅ have so far no REACH classification related to human toxicology and are not listed as substances of very high concern contrary to WO₃ and Co₃ O₄ .
Reibung, Schmierung und Verschleiß
978-3-9817451-1-5
57. Tribologie-Fachtagung
Göttingen, Germany
26.09.2016
28.09.2016
Mathias Woydt
H. Mohrbacher
J. Vleugels
S. Huang
eng
uncontrolled
cutting materials
eng
uncontrolled
niobium carbide
eng
uncontrolled
wear protection
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
33208
2015
deu
lecture
0
--
--
--
Development of NbC-based hardmetals: Influence of secondary carbide addition and metal binder
Int. Symp. on Wear Resistant Alloys for the Mining and Processing Industry
36293
Int. Symp. on Wear Resistant Alloys for the Mining and Processing Industry
Campinas, Sao Paulo, Brazil
2015-05-04
2015-05-07
0
S. Huang
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
44166
2018
eng
380
387
72
article
Elsevier Ltd.
1
--
--
--
Potentials of niobium carbide (NbC) as cutting tools and for wear protection
Research and development of WC grades is 90 years ahead of niobium carbide-based hard materials, which showed already as light-weight and unexplored material a very high potential for many technical applications, especially for wear protection and machining. NbC evoluted recently from lab scale to pilot scale, especially in areas where established WC-based materials are causing economic, environmental or technical concerns. Benchmark trials of NbC-based hard metals indicated already a favorable performance in machining of steel components.
International Journal of Refractory Metals & Hard Materials
10.1016/j.ijrmhm.2018.01.009
0263-4368
09.04.2018
Mathias Woydt
S. Huang
J. Vleugels
H. Mohrbacher
E. Cannizza
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Friction
eng
uncontrolled
Wear
eng
uncontrolled
NbC
eng
uncontrolled
Hard metals
eng
uncontrolled
Machining
eng
uncontrolled
Nickel
Ingenieurwissenschaften und zugeordnete Tätigkeiten
9 Komponentensicherheit
Material
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
9.5 Tribologie und Verschleißschutz
44206
2018
eng
521
534
conferenceobject
CBMM
0
--
--
--
NbC-based cermets: influence of secondary carbide addition and metal binder
Full densification of Fe, Co and Ni bonded NbC based cermet’s was achieved by pressure less liquid phase sintering in vacuum for one hour at 1420°C. The hardness and toughness of the NbC matrix cermet’s can be mainly tailored by the binder composition and secondary carbide additions. Ni binder based NbC cermet’s allow the combination of high hardness and improved toughness. The addition of lesser amounts of VC/Cr3C2 in a NbC partially substituted WC-Co cemented carbide increased significantly the hardness in combination with a moderate fracture toughness.
Proceedings of the International Symposium on Wear Resistant Alloy for the Mining and Processing Industry
978-0-692-05382-9
International Symposium on Wear Resistant Alloys for the Mining and Processing Industry
Sao Paulo, Brazil
04.05.2015
07.05.2015
S. G. Huang
J. Vleugels
H. Mohrbacher
Mathias Woydt
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Hardmetal
eng
uncontrolled
Cemented carbide
eng
uncontrolled
Sintering
eng
uncontrolled
Grain growth
eng
uncontrolled
Microstructure
eng
uncontrolled
Hardness
eng
uncontrolled
Fracture toughness
Ingenieurwissenschaften und zugeordnete Tätigkeiten
9 Komponentensicherheit
Material
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
9.5 Tribologie und Verschleißschutz
44962
2018
eng
43
52
274
article
Trans Tech Publ.
Uetikon
0
--
--
--
Effect of Ti(C0.7N0.3) content on the microstructure and mechanical properties of Ni bonded NbC-Ti(C0.7N0.3) based cermets
In the present work it was shown that the addition of VC or a combination of VC + Ti(C0.7N0.3) was efficient in reducing the NbC grain growth during liquid phase sintering, when compared to NbC-Ni equivalents. A finest NbC grain size of 1.48 µm was obtained in the NbC-15 Ti(C0.7N0.3)-10 Ni-7.5 VC cermet, exhibiting a hardness of 1486 +/- 7 kg/mm2 and a fracture toughness of 8.7 +/- 0.1 MPa m 1/2.
Solid State Phenomena
10.4028/www.scientific.net/SSP.274.43
1662-9779
S. G. Huang
J. Vleugels
H. Mohrbacher
Mathias Woydt
eng
uncontrolled
Cermet
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Carbonitride
eng
uncontrolled
Sintering
eng
uncontrolled
Mechanical properties
Ingenieurwissenschaften und zugeordnete Tätigkeiten
9 Komponentensicherheit
Material
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
9.5 Tribologie und Verschleißschutz
44460
2018
eng
Article 178, 1
13
3
8
article
MDPI
1
--
--
--
Effect of carbon content on the microstructure and mechanical properties of NbC-Ni based cermets
The aim of this work was to correlate the overall carbon contents in NbC-Ni, NbC-Ni-VC and NbC-Ni-Mo starting powders with the resulting microstructure, hardness, and fracture toughness of Ni-bonded NbC cermets.
Metals
10.3390/met8030178
2075-4701
urn:nbn:de:kobv:b43-444608
21.06.2018
Creative Commons - CC BY - Namensnennung 4.0 International
S. Huang
P. De Beats
J. Sukumaran
H. Mohrbacher
Mathias Woydt
J. Vleugels
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Cermet
eng
uncontrolled
Hardmetal
eng
uncontrolled
Liquid phase sintering
eng
uncontrolled
Carbon
eng
uncontrolled
Hardness
Ingenieurwissenschaften und zugeordnete Tätigkeiten
9 Komponentensicherheit
Material
Verlagsliteratur
Datei für die Öffentlichkeit verfügbar ("Open Access")
Wissenschaftliche Artikel der BAM
9.5 Tribologie und Verschleißschutz
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/44460/NbCx-Ni Huang METALS 2018.pdf
44623
2016
eng
349
355
5
71
article
Elsevier Ltd.
0
--
--
--
Microstructure and mechanical properties of NbC matrix cermets using Ni containing metal binder
The current study reports on the effect of the addition of Al metal and secondary refractory carbides on the microstructure and mechanical properties of Ni bonded NbC matrix cermets.
Metal Powder Report
10.1016/j.mprp.2016.05.009
S. G. Huang
J. Vleugels
H. Mohrbacher
Mathias Woydt
eng
uncontrolled
NbC
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Hardness
eng
uncontrolled
Hard materials
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
35805
2016
eng
65
71
352-353
article
Elsevier B.V.
1
--
--
--
Densification and tribological profile of niobium oxide
The origin of the intrinsic wear resistance of NbC-based materials is investigated through an assessment of the tribological performance of fully dense, crack-free spark plasma sintered Nb2O5 (here as a reduced polymorph: monoclinic Nb12O29 or NbO2.416). The most likely wear mechanism on NbC is the tribo-oxidation to Nb2O5. The unlubricated (dry) friction and wear behavior of alumina (99.7%) mated against rotating disks of crack-free niobium(V)oxide (Nb2O5) under unidirectional sliding (0.03–10m/s; 22°C and 400°C) and oscillation (f=20 Hz, dx=200 mm, 2/50/98% rel. humidity, n=105/106 cycles) will be presented. The microstructure and mechanical properties of the crack-free Nb2O5 are assessed. The tribological data obtained are benchmarked with different NbC grades, ceramics, cermets and thermally sprayed coatings.
Wear
10.1016/j.wear.2016.02.003
0043-1648
26.04.2016
S. G. Huang
J. Vleugels
H. Mohrbacher
Mathias Woydt
eng
uncontrolled
Friction
eng
uncontrolled
Wear
eng
uncontrolled
Nb2O5
eng
uncontrolled
Nb12O29
eng
uncontrolled
Niobium oxide
eng
uncontrolled
Strength
eng
uncontrolled
Modulus
eng
uncontrolled
High temperatures
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
48550
2019
eng
82
89
2
74
article
Elsevier Ltd.
0
--
--
--
Niobium carbide for machining and wear protection - Evolution of properties
The sales of niobium carbide (NbC) have grown in the last years, but NbC is still a hidden carbide and mainly used as grain growth inhibitor in hard metals. In the present work it was shown that the progress in the key properties, like HV30, KIC and strength, followed by machining and tribological results of the respective NbC grades.
Metal Powder Report
10.1016/j.mprp.2019.02.002
0026-0657
urn:nbn:de:kobv:b43-485507
false
true
Creative Commons - CC BY - Namensnennung 4.0 International
Mathias Woydt
S. Huang
E. Cannizza
J. Vleugels
H. Mohrbacher
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Hard metals
eng
uncontrolled
Tribology
9 Komponentensicherheit
Material
Verlagsliteratur
Datei für die Öffentlichkeit verfügbar ("Open Access")
Wissenschaftliche Artikel der BAM
9.5 Tribologie und Verschleißschutz
Bundesanstalt für Materialforschung und -prüfung (BAM)
https://opus4.kobv.de/opus4-bam/files/48550/Woydt_2019.pdf
43430
2017
eng
1
13
38
conferenceobject
American Ceramic Society
0
--
--
--
Potentials of niobium carbide (NBC) as cutting tools and for wear protection
Niobium is today largely available. NbC displayed lower dry sliding friction over WC grades. The softer Ni- and NiMo-bonded NbC1.0-grades have a higer abrasive wear resistance (ASTM G65), even with lower toughnesses, than the tougher WC-Co grades and harder NbC-Co grades.
Ceramic Engineering and Science Proceedings (CESP)
41st International Conference and Exposition on Advanced Ceramics and Composites
Daytona Beach, FL, USA
22.01.2017
27.01.2017
Mathias Woydt
H. Mohrbacher
J. Vleugels
S. Huang
eng
uncontrolled
Niobium Carbide (NbC)
eng
uncontrolled
Cutting tool
eng
uncontrolled
Hardness
eng
uncontrolled
Friction
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
43582
2018
eng
63
70
72
article
Elsevier Science
Amsterdam
1
--
--
--
NbC grain growth control and mechanical properties of Ni bonded NbC cermets prepared by vacuum liquid phase sintering
The current study reports on the effect of the sintering temperature and secondary carbide (VC, Mo2C and TiC) and Mo additions on the NbC grain growth, microstructure evolution as well as concomitant Vickers hardness (HV30) and fracture toughness of Ni-bonded NbC cermets.
International Journal of Refractory Metals & Hard Materials
10.1016/j.ijrmhm.2017.12.013
0263-4368
09.04.2018
S. G. Huang
J. Vleugels
H. Mohrbacher
Mathias Woydt
eng
uncontrolled
Cermet
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Sintering
eng
uncontrolled
Microstructure
eng
uncontrolled
Mechanical properties
Ingenieurwissenschaften und zugeordnete Tätigkeiten
9 Komponentensicherheit
Material
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
9.5 Tribologie und Verschleißschutz
40505
2017
eng
188
197
66
article
1
--
--
--
Microstructure and tribological performance of NbC-Ni cermets modified by VC and Mo2C
The current study reports on the influence of the Addition of 5–15 vol% VC or/and Mo2C carbide on the microstructure and mechanical properties of nickel bonded NbC cermets, which are compared to cobalt bonded NbC cermets. The NbC, Ni and secondary carbides powder mixtures were liquid phase sintered for 1 h at 1420 °C in vacuum. The fully densified cermets are composed of a cubic NbC grains matrix and an evenly distributed fcc Ni binder. NbC grain growth was significantly inhibited and a homogeneous NbC grain size distribution was obtained in the cermets with VC/Mo2C additions. The mechanical properties of the NbC-Ni matrix cermets are strongly dependent on the carbide and Ni binder content and are directly compared to their NbC-Co equivalents.
The liquid phase sintered NbC-12 vol% Ni cermet had a modest Vickers hardness (HV30) of 1077 ± 22 kg/mm2 and an indentation toughness of 9.1 ± 0.5 MPa·m1/2. With the addition of 10–15 vol% VC, the hardness increased to 1359 ± 15 kg/mm2, whereas the toughness increased to 11.3 ± 0.1 MPa·m1/2. Addition of 5 and 10 vol% Mo2C into a NbC-12 vol% Ni mixtures generated the same values in HV30 and KIC when compared to VC additions. A maximum flexural strength of 1899 ± 77 MPa was obtained in the cermet with 20 vol% Ni binder and 4 vol% VC+4 vol% Mo2C addition, exhibiting a high fracture toughness of 15.0 ± 0.5 MPa·m1/2, but associated with a loss in hardness due to the high Ni content. The dry sliding wear behaviour was established at room temperature and 400 °C from 0.1 to 10 m/s.
International Journal of Refractory Metals & Hard Materials
10.1016/j.ijrmhm.2017.03.012
0263-4368
04.01.2018
S. G. Huang
J. Vleugels
H. Mohrbacher
Mathias Woydt
eng
uncontrolled
Cermet
eng
uncontrolled
Liquid phase sintering
eng
uncontrolled
Grain growth
eng
uncontrolled
Wear
eng
uncontrolled
Niobium carbide
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
39901
2017
eng
142
150
138
article
Elsevier
1
--
--
--
Modes of action of a mono-component intumescent flame retardant MAPP in polyethylene-octene elastomer
A mono-component intumescent flame retardant named ethylenediamine-modified ammonium polyphosphate (MAPP) is used in polyethylene-octene elastomer (POE). Insight into the flame-retardant mechanisms of the MAPP is provided from a new perspective. The fire performance of POE/MAPP composites is investigated by oxygen index (OI) and vertical burning (UL-94) tests. POE Composite containing 35 wt% MAPP achieves a V-0 rating, and its OI is 29.3 vol%. The thermogravimetric Analysis (TGA) and Fourier transform infrared spectra (FTIR) confirm that the incorporation of ethylenediamine changes the thermal decomposition of APP, mainly resulting in the formation of char layer with a thermally stable structure. Cone calorimeter analysis revealed the flame-retardant modes of action of MAPP in POE under forced-flaming conditions. Quantitative analysis illustrates that both the residue due to charring and the fuel dilution/flame Inhibition resulting from the release of incombustible products/ phosphorus species decrease the total heat release (fire load) by 20e28%. The residue increases linearly with increasing MAPP content, whereas the reduction in effective heat of combustion levels off. Moreover, the flame-retardant effect resulting from the protective properties of the char is discovered to be the dominant mode of action (up to 85% reduction) with respect to the peak heat release rate, leading to the excellent flame retardancy of POE/MAPP.
Polymer Degradation and Stability
0141-3910
10.1016/j.polymdegradstab.2017.03.006
1873-2321
18.05.2017
C. Deng
Huajie Yin
R.-M. Li
S.-C. Huang
Bernhard Schartel
Y.-Z. Wang
eng
uncontrolled
Ammonium polyphosphate
eng
uncontrolled
Flame retardant
eng
uncontrolled
Carbonization
eng
uncontrolled
Elastomer
Ingenieurbau
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
40647
2017
eng
poster
0
--
--
--
Effect of carbon content on the microstructure and mechanical properties of NbC-Ni based cermets
The aim of this work was to correlate the carbon content in NbC-Ni starting powders with the resulting microstructure, hardness and fracture toughness of Ni-bonded NbC cermets.
19. Plansee Seminar
Reutte, Austria
29.05.2017
02.06.2017
S. G. Huang
eng
uncontrolled
Cermet
eng
uncontrolled
Liquid phase sintering
eng
uncontrolled
Microstructure
eng
uncontrolled
Hardness
eng
uncontrolled
Carbon
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Präsentation
40671
2017
eng
721
734
conferenceobject
Metal Powder Industries Federation
0
--
--
--
Status of nickel bonded niobium carbide (NbC) as a substitute for cobalt-bonded tungsten carbide (WC) as cutting tools and for wear protection
Niobium is today largely available. The initial NbC grade was substoichiometric, SPS sintered and cobalt bonded (NbC0.88-12Co SPS). The NiMo-bonded stoichiometric NbC1.0 grades enable the subtituion of cobalt by nickel, SPS by conventional sintering and NbC0.88 by NbC1.0 in view of functional properties. Nickel bonded NbC grades have improved toughnesses versus cobalt bonded NbC grades, but lose hardness. NiMo and NiMo2C bonded NbC1.0 grades compensated the loss in hardness while keeping the toughness.
Advances in Powder Metallurgy & Particulate Materials
POWDERMET 2017
Las Vegas, USA
13.06.2017
16.06.2017
Mathias Woydt
H. Mohrbacher
J. Vleugels
S. Huang
eng
uncontrolled
Niobium carbide (NbC)
eng
uncontrolled
Cutting tools
eng
uncontrolled
Wear
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
40592
2017
eng
HM 13/1
HM 13/11
conferenceobject
0
--
--
--
NbC grain growth control and mechanical properties of Ni bonded NbC cermets prepared by vacuum liquid phase sintering
The current study reports on the effect of the sintering temperature and secondary carbide (VC, Mo2C and TiC) additions on the microstructure and concommitant Vickers hardness (HV30) and fracture toughness of Ni-bonded NbC cermets. All cermets were prepared by pressureless sintering in vacuum. Detailed microstructural investigation was performed by electron probe microanalysis (EPMA) and X-ray diffraction (XRD) analysis. Sintering results indicated that both the sintering temperature and secondary carbide additions had a significant effect on the properties of NbC-Ni cermets. Nickel pools and residual pores were observed in the cermets sintered at temperatures ≤ 1340 °C. Increasing of the sintering temperature up to 1420 or 1480 °C resulted in fully densified NbC-Ni based cermets composed of homogeneous contrast cubic NbC grains for the single carbide (VC or Mo2C) modyfied system, whereas core-rim structured NbC grains were observed with the additon of TiC + VC or TiC+Mo2C. The secondary carbide doped cermets with 5–10 vol.% VC/Mo2C and 10 vol.% TiC showed a significantly improved hardness and fracture toughness, as compared to the plain NbC-Ni cermets.
International Conference on Refractory Metals and Hard Materials- 19th Plansee seminar
19. Plansee Seminar
Reutte, Austria
29.05.2017
02.06.2017
S. G. Huang
J. Vleugels
H. Mohrbacher
Mathias Woydt
eng
uncontrolled
Cermet
eng
uncontrolled
Hard materials
eng
uncontrolled
Sintering
eng
uncontrolled
Microstructure
eng
uncontrolled
Core-rim
eng
uncontrolled
Mechanical properties
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
40593
2017
eng
HM 102/1
HM 102/16
conferenceobject
0
--
--
--
Potentials of niobium carbide (NbC) as cutting tools and for wear protection
The tool lifes of uncoated NiMo and NiMo2C-bonded stoichiometric NbC1.0 grades under dry turning 42CrMo4 and C45E were between +30 % to + 100 % higher and up compared to WC-6Co (fine grain). Niobium is today largely available. NbC grades displayed lower dry sliding friction over WC grades.
International Conference on Refractory Metals and Hard Materials
19. Plansee Seminar
Reutte, Austria
29.05.2017
02.06.2017
Mathias Woydt
H. Mohrbacher
J. Vleugels
S. Huang
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Friction
eng
uncontrolled
Wear
eng
uncontrolled
NbC
eng
uncontrolled
Hard metal
eng
uncontrolled
Machining
eng
uncontrolled
Nickel
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
40595
2017
eng
HM 109/1
HM 109/11
conferenceobject
0
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Effect of carbon content on the microstructure and mechanical properties of NbC-Ni based cermets
The aim of this work was to correlate the carbon content in NbC-Ni starting powders with the resulting microstructure, hardness and fracture toughness of Ni-bonded NbC cermets.
International Conference on Refractory Metals and Hard Materials
19. Plansee Seminar
Reutte, Austria
29.05.2017
02.06.2017
S. G. Huang
J. Vleugels
H. Mohrbacher
Mathias Woydt
eng
uncontrolled
Cermet
eng
uncontrolled
Liquid phase sintering
eng
uncontrolled
Microstructure
eng
uncontrolled
Hardness
eng
uncontrolled
Carbon
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
46201
2018
eng
Part 5, 801
809
conferenceobject
0
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--
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Niobium carbide based cermets with secondary carbide and carbonitride addition
In this study, the influence of Ni binder content and carbide/carbonitride additions on the microstructure and mechanical properties of NbC-Ni matrix cermets were investigated.
Niobium carbide based cermets with secondary carbide and carbonitride addition
WORLDPM2018
Beijing, China
16.09.2018
20.09.2018
S. Huang
J. Vleugels
E. Cannizza
Mathias Woydt
Z. Liu
H. Mohrbacher
eng
uncontrolled
Cermet
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Carbonitride
eng
uncontrolled
Sintering
eng
uncontrolled
Mechanical properties
Ingenieurwissenschaften und zugeordnete Tätigkeiten
9 Komponentensicherheit
Material
Degradation von Werkstoffen
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
9.5 Tribologie und Verschleißschutz
46204
2018
eng
Part 5, 785
795
conferenceobject
0
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--
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Tailoring the functional profile of niobium carbide (NbC) as cutting tool materials and for wear protection
In the present work it was shown that the properties of NbCx, like micro-hardness, hot-hardness, sliding wear resistance, elastic modulus and toughness can be tailored by the C/Nb ratio, the addition of secondary carbides and the type of binder.
2018 World Congress on Powder Metallurgy
WORLDPM2018
Beijing, China
16.09.2018
20.09.2018
Mathias Woydt
S. Huang
J. Vleugels
H. Mohrbacher
E. Cannizza
eng
uncontrolled
Niobium carbide
eng
uncontrolled
Properties
eng
uncontrolled
Wear
eng
uncontrolled
Machining
Ingenieurwissenschaften und zugeordnete Tätigkeiten
9 Komponentensicherheit
Material
Degradation von Werkstoffen
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
9.5 Tribologie und Verschleißschutz