Cross section of the coatings was observed by metallurgical microscopy. Hardness of the coatings was tested by micro-hardness tester.
采用光学金相显微镜观察涂层断面的形貌，通过显微硬度计测试涂层的显微硬度。
Cross section of the coatings was observed by metallurgical microscopy. Hardness of the coatings was tested by micro-hardness tester.
采用光学金相显微镜观察涂层断面的形貌，通过显微硬度计测试涂层的显微硬度。
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