摘要
The wear behaviour of composite coatings is related to the nature of embedded particles.The effects of particle size on the wear behaviour of composite coatings are analyzed.Electroless nickel composite coatings containing diamond particles with the sizes in the range of 0—0.5,0.5—1,1—2μm are prepared.The surface morphology of diamond particles and composite coatings are observed by scanning electron microscopy(SEM).The wear tests of composite coatings are comparatively evaluated by sliding against a cemented tungsten carbide ball.The 3D morphology of worn scar is evaluated by using a 3Dprofiler.The results show that the hardness and wear resistance of composite coatings can increase with the increase of particle sizes.The mixture mechanism of adhesive wear and abrasive wear turn into single abrasive wear with the increase of particle sizes as well.The transformation of wear behaviour is mainly attributed to particle roles during wear process.
The wear behaviour of composite coatings is related to the nature of embedded particles. The effects of particle size on the wear behaviour of composite coatings are analyzed. Electroless nickel composite coatings contai- ning diamond particles with the sizes in the range of 0--0.5, 0.5--1, 1--2 /~m are prepared. The surface mor- phology of diamond particles and composite coatings are observed by scanning electron microscopy （SEM）. The wear tests of composite coatings are comparatively evaluated by sliding against a cemented tungsten carbide ball. The 3D morphology of worn scar is evaluated by using a 3D profiler. The results show that the hardness and wear resistance of composite coatings can increase with the increase of particle sizes. The mixture mechanism of adhesive wear and abrasive wear turn into single abrasive wear with the increase of particle sizes as well. The transformation of wear behaviour is mainly attributed to particle roles during wear process.
基金
Supported by the National Natural Science Foundation of China(51175260)
the Fundamental Research Funds for the Central Universities(NP2012506)
the Open Fund of Jiangsu Province Key Laboratory for Materials Tribology(kjsmcx0901)
