Open AccessPreparation of Al2O3/W-Cr composite and its tribology properties
Author(s) -
Zhenxin Lyu,
Lei Jia,
Lijuan Ma
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1347/1/012037
Subject(s) - tribology , materials science , abrasive , composite number , microstructure , powder metallurgy , adhesive wear , composite material , adhesive , friction coefficient , metallurgy , layer (electronics)
Microstructure and its formation process as well as tribology properties of Al 2 O 3 /W-Cr composite prepared by sol-gel and powder metallurgy method were studied in this paper. Results show that the Al 2 O 3 particles can be distributed uniformly in the mixed powders of W-Cr by sol-gel method, and metallurgical bonding between W and Al 2 O 3 particles can also be realized by the bonding action of Cr particles. The wear rate of Al 2 O 3 /W-Cr composite increases with the increase of testing load, but the friction coefficient increases firstly and then decreases. When the testing load is 15 N, the friction coefficient reaches the peak value. Wear mechanism of Al 2 O 3 /W-Cr composite is dominated by abrasive wear at lower testing loads, but transfer to adhesive wear accompanied with oxidation at high testing loads.