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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.1
- 수록면
- 1,103 - 1,112 (10page)
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초록· 키워드
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The Cu–La2O3 composite was prepared by internal oxidation method. The friction and wear behavior was examined underdifferent applied load and sliding velocity according to ASTM G99 standard. The results showed the size of La2O3particleswas about 150 nm, which were homogeneous distributed in the Cu matrix. The mean size of Cu grains in the Cu–1.32 wt%La2O3composite decreased by 60% compared with that of pure Cu. The ultimate tensile strength of the Cu–1.32 wt% La2O3composite was 328 MPa. The dominant strengthening mechanisms were the grain size strengthening and thermal mismatchstrengthening. The wear rate of Cu–1.32 wt% La2O3composites was lower than that of pure copper and it increased withthe increase of applied load and sliding velocity. The mild to severe wear transition appeared at different load and velocity.The wear mechanisms were abrasive wear and oxidative wear in mild wear. However, it changed to plastic deformation anddelamination wear in severe wear.
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