【摘 要】
：
CrN coatings were deposited on cemented carbide substrates by filtered cathodic vacuum arc technique (FCVA).The effect of different deposition parameters:nitrogen partial pressure,substrate-bias volta
【机 构】
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Key Laboratory of Advanced Technologies of Materials,Ministry of Education,Southwest Jiaotong Univer
【出 处】
：
Fifth International Conference on Surface Engineering(第五届表面工
论文部分内容阅读
CrN coatings were deposited on cemented carbide substrates by filtered cathodic vacuum arc technique (FCVA).The effect of different deposition parameters:nitrogen partial pressure,substrate-bias voltage and preheating of the specimens,on the structural and mechanical properties of the coatings was investigated.X-ray diffraction analysis was used to determine the structure and the composition of the coatings.The tribological behaviour and wear properties of the coatings against Si3N4 ball with diameter of 4 mm were studied under reciprocating sliding condition.The results showed that a smooth and dense CrN coating with best properties can be obtained provided a pure Cr interlayer was pre-deposited.The optimal deposition parameters were the nitrogen partial pressure of 0.1 Pa,substrate-bias voltage of-100 V.However,preheating of the substrata was not good for improving the properties of the coating.The FCVA CrN coating showed high hardness and good wear resistance,which was probably attributed to its smooth surface and dense microstructure.However,the coating flaked off at relatively high normal load (20 N).The wear mechanism of the CrN coatings was a combination of abrasion and oxidation.
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