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Effect of Sintering Temperature on Mechanical and Tribological Behavior of Ti–Ni Alloy for Biomedical Applications

  • Ti–Ni powder compacts were prepared by mechanical alloying (MA), followed by hot isostatic pressing (HIP). Afterwards, the samples were sintered at different temperatures (950, 1050, 1150 and 1250 °C). Microhardness, density, crystallite size as well as microstrain of the sintered samples were measured and analyzed. Wear characteristics in phosphate-buffered saline (PBS) solution was tested under different applied loads of 2 N, 10 N, and 20 N, respectively. The results indicated that the crystallite size continuously decreases with increasing sintering temperature and reaches the lowest value of 31.3 nm at 1250 °C. The relative density of the sample sintered at 1250 °C is 98.0%. Moreover, the higher sintering temperatures lead to the higher relative density and the increase in hardness and young’s modulus of the sample. At the same time the friction coefficient and wear rate were lower for the samples sintered at 1250 °C. This improvement in friction and wear resistance is attributed to the grain size refinement. Ti–Ni sintered atTi–Ni powder compacts were prepared by mechanical alloying (MA), followed by hot isostatic pressing (HIP). Afterwards, the samples were sintered at different temperatures (950, 1050, 1150 and 1250 °C). Microhardness, density, crystallite size as well as microstrain of the sintered samples were measured and analyzed. Wear characteristics in phosphate-buffered saline (PBS) solution was tested under different applied loads of 2 N, 10 N, and 20 N, respectively. The results indicated that the crystallite size continuously decreases with increasing sintering temperature and reaches the lowest value of 31.3 nm at 1250 °C. The relative density of the sample sintered at 1250 °C is 98.0%. Moreover, the higher sintering temperatures lead to the higher relative density and the increase in hardness and young’s modulus of the sample. At the same time the friction coefficient and wear rate were lower for the samples sintered at 1250 °C. This improvement in friction and wear resistance is attributed to the grain size refinement. Ti–Ni sintered at 1250 °C showed good tribological performance under all test conditions.show moreshow less

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Author: Mamoun Fellah, Naouel Hezil, Mohamed Zine Touhami, Mohammed A. Hussien, Alex Montagne, Alberto Mejias, Alain Iost, Stephania Kossman, Timofey ChekalkinORCiD, Aleksei ObrosovORCiD, Sabine WeißORCiDGND
DOI:https://doi.org/10.1007/978-3-030-36296-6_157
ISBN:978-3-030-36295-9
ISBN:978-3-030-36296-6
ISSN:2367-1181
ISSN:2367-1696
Title of the source (English):TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings
Publisher:Springer
Place of publication:Cham
Document Type:Conference publication peer-reviewed
Language:English
Year of publication:2020
Tag:Biomedical applications; Nanobiomaterials; Sintering; Ti–Ni; Tribological behaviour
First Page:1701
Last Page:1710
Series ; volume number:The Minerals, Metals & Materials Series book series ; 2020
Faculty/Chair:Fakultät 3 Maschinenbau, Elektro- und Energiesysteme / FG Metallkunde und Werkstofftechnik
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