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Materials 2016, 9(12), 986; doi:10.3390/ma9120986

Microstructure and Tribological Properties of Mo–40Ni–13Si Multiphase Intermetallic Alloy

School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, China
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Academic Editor: Auezhan Amanov
Received: 19 October 2016 / Revised: 16 November 2016 / Accepted: 29 November 2016 / Published: 6 December 2016
(This article belongs to the Special Issue Tribological Behavior of Materials by Surface Engineering)
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Abstract

Intermetallic compounds are increasingly being expected to be utilized in tribological environments, but to date their implementation is hindered by insufficient ductility at low and medium temperatures. This paper presents a novel multiphase intermetallic alloy with the chemical composition of Mo–40Ni–13Si (at %). Microstructure characterization reveals that a certain amount of ductile Mo phases formed during the solidification process of a ternary Mo–Ni–Si molten alloy, which is beneficial to the improvement of ductility of intermetallic alloys. Tribological properties of the designed alloy—including wear resistance, friction coefficient, and metallic tribological compatibility—were evaluated under dry sliding wear test conditions at room temperature. Results suggest that the multiphase alloy possesses an excellent tribological property, which is attributed to unique microstructural features and thereby a good combination in hardness and ductility. The corresponding wear mechanism is explained by observing the worn surface, subsurface, and wear debris of the alloy, which was found to be soft abrasive wear. View Full-Text
Keywords: intermetallic; refractory metal; tribological property; toughening intermetallic; refractory metal; tribological property; toughening
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MDPI and ACS Style

Song, C.; Wang, S.; Gui, Y.; Cheng, Z.; Ni, G. Microstructure and Tribological Properties of Mo–40Ni–13Si Multiphase Intermetallic Alloy. Materials 2016, 9, 986.

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