摘要
以团聚氧化铝复合颗粒为原料,采用等离子喷涂法,变化特征喷涂参数(CPSP),在Q235钢表面制备陶瓷涂层。对制备的涂层进行热震性能测试,并用扫描电镜和X射线衍射仪分析粉末和热震性能较优涂层的微观结构和相组成特征。结果表明:随特征喷涂参数(CPSP)值的上升,热震循环次数先增大后降低;以适中的特征喷涂参数(CPSP=750 A.V/L.min-1)制备的陶瓷涂层,热震循环次数最大;其微观结构为典型的双模结构,由部分熔化区和完全熔化区组成;涂层中主要物相为γ-Al2O3、α-Al2O3和Al2TiO5。
Using reconstructed Al2O3 particle as raw materials,ceramic coatings were deposited on Q235 steel surface by plasma spraying at different critical plasma spray parameters（CPSP）.The thermal shock resistance of the coating was tested,the microstructure morphologies and phase constitute of the powder and the coating with superior thermal shock resistance were detected by SEM and XRD.The results show that as the value of critical plasma spray parameters（CPSP） increase,the thermal shock times increase at first and then decrease.At moderated CPSP value（et.CPSP=750A·V/L·min-1）,the thermal shock resistance of the coating is best of all.The microstructure morphology of the coating deposited at moderated CPSP condition is typical bimodal microstructure which consists of partial melted region and full melted region.And the phase in the coating mainly consists of γ-Al2O3,α-Al2O3 and Al2TiO5.
出处
《热加工工艺》
CSCD
北大核心
2011年第4期102-105,109,共5页
Hot Working Technology
基金
四川省科技厅应用基础项目(2009JY0141)
西华大学人才培养基金资助项目(R0910105)
关键词
团聚颗粒
特征喷涂参数
热震性能
双模结构
reconstructed particle
CPSP
thermal shock resistance
bimodal microstructure
