摘要
采用大气等离子喷涂方法制备了不同SiC晶须含量的Al_2O_3-SiC复合涂层,研究了晶须含量对涂层的微观结构、硬度和弹性模量等的影响。结果表明:随着喷涂粉末中SiC晶须的含量增大,Al_2O_3-SiC复合涂层的孔隙率增加,而涂层的显微硬度降低。随着与涂层/基体结合面距离的增加,涂层的显微硬度呈现先增加后降低的趋势。纳米压痕的测试表明,随压痕深度增加,涂层的弹性模量先增大后降低,最后趋于稳定。在现有的研究范围内,SiC晶须含量为10%的复合涂层的韧性优于5%和15%的复合涂层。
Atmospheric plasma spraying technology was used to produce Al2O3-SiC composite coating with different SiC whisker content. Effects of SiC whisker content on the mierostructure, hardness and elastic modulus of coating were studied. The results show that with the increase of SiC whisker content, the porosity of Al2O3-SiC coating increases and the micro-hardness of coating decreases. With the increase of distance between the substrate and the coating, the micro-hardness of coating increases firstly and then decreases. The result ofnano mark test shows that the elastic modulus of coating increases firstly and then decreases, and finally tends to be stable. The toughness of coating with 10% SiC content is higher than that of coating with 5% and 15% SiC content in the present investigation range.
出处
《热加工工艺》
CSCD
北大核心
2016年第8期169-171,175,共4页
Hot Working Technology
