氩弧熔覆C-Si/C-Si-Zr复合涂层组织及抗氧化性  

Microstructure and oxidation resistance of C-Si/C-Si-Zr composite coating by argon arc cladding

作　　者：梁刚[1] 赵国刚[2] 

机构地区：[1]黑龙江科技大学材料科学与工程学院,哈尔滨150022 [2]哈尔滨理工大学,哈尔滨150080

出　　处：《黑龙江科技大学学报》2015年第2期201-205,共5页Journal of Heilongjiang University of Science And Technology

基　　金：黑龙江省教育厅科学技术研究项目(12541705)

摘　　要：为解决石墨电极氧化问题,以Si粉和Zr粉为原料采用氩弧熔覆技术,在石墨电极表面制备出C-Si/C-Si-Zr抗氧化复合涂层。在1 100℃和1 300℃两个不同温度条件下,氧化10 h后,测试C-Si-Zr复合涂层的抗氧化性能。利用SEM、EDS和XRD分别对氧化前后复合涂层的组织结构和物相进行分析,阐述复合涂层的氧化机理。结果表明:复合涂层表面具有金属光泽,平整光滑,与基体之间结合良好、无明显缺陷。在两种不同温度条件下,C-Si-Zr复合涂层中不断增加的Si O2-Zr O2填补了涂层表面缺陷,基体得到有效保护。This paper is aimed at a solution to graphite electrode oxidation. The solution is rendered possible by preparing C-Si/C-Si-Zr oxidation resistance composite coating on the surface of graphite elec- trode using Si powder and Zr powder as raw material and applying argon arc cladding technology and this is validated by testing the antioxidant properties of C-Si-Zr composite coating at the temperature conditions of 1 100 ~C and 1 300 ~C, after 10 h oxidation; analyzing the microstructure and the phase composition of composite coating by using scanning electron microscopy （SEM）, energy dispersive spectroscopy （EDS） and X-ray diffraction （XRD） ; and analyzing the oxidation mechanism of the composite coating. The re- sults show that the coating prepared under the optimum process boasts a surface with advantages, such as a smooth metallic luster, a better binding between the coating and substrate and few obvious defects; and an increasing amount of SiO2-ZrO2 in C-Si-Zr composite coating in two different conditions of temperature fill the defects of the C-Si-Zr composite coating surface, providing an effective protection for the sub- strate.

关 键 词：氩弧熔覆 石墨电极 复合涂层 高温氧化 

分 类 号：TG174[金属学及工艺—金属表面处理]