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Vol.33, No.4, 556 ~ 563, 1995
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| Title |
| Microstructures and Mechanical Properties of the Plasma , Sprayed Mo and Co Alloy Coating Layeers |
| 남태현 , 허경철 , 이수원 , 하국현 , 김병기 Tae Hyun Nam , Gyeong Chul Hur , Soo W . Lee , Gook Hyun Ha , Byung Kee Kim |
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| Abstract |
| Microstructures and mechanical properties of Mo and Co alloy coating layers made by plasma spray coating method have been examined by measn of optical microscopy, X-ray diffraction, scanning electron microscopy, microvickers hardness tests, surface roughness tests and wear resistance tests. The splat is relatively flat with the boundary in Mo layers, whereas wavy with interfaces at some angle to the surfaces in Co alloy layers. The Mo coating layers were shown to be crystalline state but the Co alloy layers to be amourphous state in X-ray diffraction profiles. The surface roughness, hardness, wear resistance of the Co alloy layers were superior to those of the Mo layers. The wear mechanism in plasma coating layers was splat delamination in which the wavy splat is much harder to be delaminated than the falt splat. |
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