不同环境气氛中NiAl-2.5Ta-7.5Cr-1B-5Co-2.5Re合金的摩擦磨损特性

doi:10.11896/cldb.201902016

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Abstract The wear characteristics of NiAl-2.5Ta-7.5Cr-1B-5Co-2.5Re alloy in different ambient atmospheres were studied. The phase composition and wear mechanism of the alloy were analyzed by XRD, SEM and EDS. The results showed that the wear surface of the alloy does not form nitride and its chemical adsorption layer in the vacuum and nitrogen, the alloy is in direct against Si3N4, The oxidation of the air causes the surface of the alloy with oxide film. In different ambient atmosphere, the wear rate of the alloy are mainly controlled by the contact state and wear mechanism, the friction surface is in elastic contact state at 3~5 N, and the wear rate is mainly influenced by the adhesive wear mechanism. 10~20 N, the friction surface is in plastic contact state,and its wear rates are mainly controlled by the abrasive wear. In the vacuum and nitrogen, the friction coefficients are mainly controlled by the shear force of the friction. In the air environment,the oxide film on the wear surface have a great influence on friction coefficients.

Key words： NiAl-2.5Ta-7.5Cr-1B-5Co-2.5Re ambient atmosphere wear mechanism wear rate friction coefficient

Published: 31 January 2019

CLC number:	TH117
	TG146

Fund:This work was financially supported by the National Natural Science Foundation of China (51101055), the Science Foundation of Hunan (13JJ8015), the Graduate students Science Foundation of Hunan (CX2016B553) .

About author:: Xin Su, received his B.E. degree in Material Proces-sing and Control Engineering and Ph.D. degree in Materials Science and Engineering from the Hunan University of Science and Technology (HNUST) in Sep. 2011—Jan. 2018. The first author published 1 paper in domestic and foreign academic journals and applied for 2 national invention patents. During the school, he hosted the Hunan Graduate Innovation Fund Project and won the third prize of the Excellent Paper of Hunan Innovation Forum. The research work is mainly on the friction and wear properties of NiAl-based alloys; the self-lubricating mechanism of NiAl-based alloys; the welding of niobium alloys.Zhensheng Wang, associate professor of Hunan University of Science and Technology, master tutor. In 2009, he graduated from the Institute of Metal Research, Chinese Academy of Sciences. Among them,2016—2017 went to Japan University of Technology for a visit and cooperation research. He has published more than 20 papers in academic journals at home and abroad, and applied for 21 national invention patents, of which 14 were authorized. The main research directions of the team include: friction and wear properties of NiAl-based alloys; self-lubricating mechanism of NiAl-based alloys; high-strength wear-resistant cast iron; welding of niobium alloys; product development of high-strength, high-resistance pipeline steel forming molds. Responsible for completing 2 research projects. He won the third prize of the ministerial level scientific and technological progress award and the second prize of the municipal science and technology progress award. It has trained 5 masters and nearly 100 undergra-duates.

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Cite this article:

SU Xin,WANG Zhensheng,PENG Zhen, et al. Friction and Wear Characteristics of NiAl-2.5Ta-7.5Cr-1B-5Co-2.5Re Alloy in Different Ambient Atmospheres[J]. Materials Reports, 2019, 33(2): 288-292.

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http://www.mater-rep.com/EN/10.11896/cldb.201902016 OR http://www.mater-rep.com/EN/Y2019/V33/I2/288

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