Interfac, Structure between Substrate and Coating and or Sprash Particles and Characteristics of SUS304/Ni-P alloy Composite Coatings formed by Wire Explosion Spraying Process

通过X射线衍射、电子探针分析、硬度试验、磨损试验和涂层与基材的结合力试验，研究了在碳钢基材上喷涂的CuS_3O_4/Ni-P合金复合涂层的性能。并用透射电子显微镜观察了基材与涂层和/或喷射颗粒之间的界面结构。结果表明：(1)喷涂涂层由SUS_3O_4飞溅和Ni-P合金飞溅混合而成.(2)从透射电子显微镜的衍射图可以看出，部分Ni-P合金飞溅是非晶态的.(3)复合镀层的硬度随Ni-P合金含量的增加而增加.(4)复合镀层的磨损量在60%~80%范围内最小.(5)随着Ni-P合金含量的增加，涂层表面变得光滑.(6)60Vol%Ni-P合金涂层具有最大的结合强度。(7)在10%的盐酸溶液中，所有的SUS_3O_4/Ni-P合金复合煤粉都是附着的。涂层的耐腐蚀性较差是由于涂层中存在气孔和裂纹。(8)可以制作样品进行透射电子显微镜观察。但是，基材与涂层之间的界面和/或飞溅并未被区分。

Characteristics of SUS 3O4/Ni-P alloy composite coatings sprayed on carbon steel substaretes were investigated by X-ray dffraction, EPMA analysis, hardness test, wear test and adhesion test between substrate and coating. And also interface structure between substrate and coating and or sprash particles west investigated by TEM observation. The obtained results are as follows.(1) Sprayed coatings consist of mixture of SUS3O4 splashes and Ni-P alloy splashes.(2) It can be seen from TEM diffraction pattern that a part of Ni-P alloy splashes are amorphized.(3) Hardness of composite coating increases with increasing Ni-P alloy content(4) Wear loss of composite coatings shows minimum in the range between 60 and 8O vol%Ni-P alloy content(5) Surface of coatings are smooth wity increasing Ni-P alloy content, while surface roughness is low.(6) 6Ovol%Ni-P alloy coating shows maximum adhesion strength between substrate and coaling.(7) All of the SUS 3O4/Ni-P alloy composite coalnigs are attackedin l0% HCl solution. Bad corrosion resistance is due to presence of pores and cracks in coatings.(8) Specimens for TEM observation can be made. But, interface between substrate and coating and or splashes were not distinguished.