【摘要】 以相同的陶瓷骨料(由TiO2、Al2O3和Zn组成),在纯铜基材上分别制备热化学反应法陶瓷涂层和热化学反应陶瓷/渗铝复合涂层,通过X射线衍射和扫描电镜研究了2种涂层的组成和结构,并比较了两者的性能差异。结果表明,热化学反应陶瓷/渗铝复合涂层在热固化过程中除了产生机械和化学结合外,还产生了冶金结合,其致密性、结合强度均较热化学反应法陶瓷涂层优异。相对于基体,热化学反应法陶瓷涂层的耐酸性、耐盐性和耐盐雾腐蚀性分别提高了2.95、5.33和2.15倍,而封孔后的复合涂层则提高了9.78、16.28和5.31倍。更多还原

【Abstract】 A thermochemical reaction ceramic coating and a thermochemical reaction ceramic/aluminizing composite coating were prepared on pure copper substrates with same ceramic binder composed of TiO2,Al2O3,and Zn. Their compositions and structures were studied by X-ray diffraction and scanning electron microscopy,and their performances were compared. The results showed that not only mechanical and chemical combination,but also metallurgical combination exists in the composite coating during heat treatment. The composite coating has superior compactness and bond strength to the thermochemical reaction ceramic coating. Compared with the substrate,the resistance to acid,saline,and salt spray corrosion are increased respectively by 2.95,5.33,and 2.15 times for the thermochemical reaction ceramic coating,but by 9.78,16.28,and 5.31 times for the composite coating after sealing.更多还原