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| Effect of Co Content on Tribological Behavior of Ni-Co-Al P/M Superalloy |
Chenglai XIN1,2,Wenzhen WANG1,**( ),Qin MA2,Hongjian GUO1 |
1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000 2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050 |
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Cite this article:
Chenglai XIN,Wenzhen WANG,Qin MA,Hongjian GUO. Effect of Co Content on Tribological Behavior of Ni-Co-Al P/M Superalloy. Chinese Journal of Materials Research, 2014, 28(7): 490-496.
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Abstract Ni-Co-Al high temperature alloys with different Co content were prepared by powder metallurgy (mechanical alloying and hot-press sintering), of which the high temperature tribological properties were investigated at 800℃. The results showed that the hardness and compressive strength, as well as the tribological properties of alloys could be improved with a Co addition in a range from 5-30 mass%, among which 20 mass% is the optimal. The observation of worn surfaces by SEM, XPS and EDS revealed that a “glaze-like film” consisted of CoO and other oxides existed on the worn surface. The high temperature tribological properties of the alloys are highly related with the composition and the spallation tendency of the formed glaze film during the friction and wear process.
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Received: 18 January 2014
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| Fund: *Supported by National Natural Science Foundation of China No. 51101166. |
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