纳米和微米ZrB_(2)-SiC粉末对涂层抗烧蚀性能的影响  

Effects of Nano and Micro ZrB_(2)-SiC Powderon Ablation-resistance Property of Coating

作　　者：张一 李文生[2] 安国升[2] ZHANG Yi;LI Wensheng;AN Guosheng(School of Materials Science and Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州交通大学材料科学与工程学院,兰州730070 [2]兰州理工大学材料科学与工程学院,兰州730050

出　　处：《兰州交通大学学报》2023年第4期113-119,共7页Journal of Lanzhou Jiaotong University

摘　　要：310S耐热不锈钢因具有抗氧化、耐腐蚀等优良性能的同时,亦具有良好的耐高温性能,在工业中得到较为广泛的应用。但在高温高速焰流冲刷等极端环境下的氧化失效限制了其实际应用。表面涂层技术是提升基体耐高温、耐烧蚀能力的有效手段。选用纳米团聚粉末和常规微米ZrB_(2)-SiC粉末,利用超音速等离子喷涂在310S耐热不锈钢基体上制备以CoCrAlYTa为粘结层、ZrB_(2)-SiC为陶瓷层的复合涂层,对两种涂层分别进行了氧-乙炔高温烧蚀试验。采用XRD、EDS、SEM分析涂层组织结构。结果表明:纳米团聚粉末(n-ZS)涂层表面孔隙和微裂纹较微米商用粉末(m-ZS)涂层大幅减少,涂层更为致密;m-ZS涂层的耐烧蚀时长达600 s,较n-ZS涂层耐烧蚀时长提升12倍左右。310S heat-resistant stainless steel has excellent properties such as oxidation resistance and corrosion resistance,as well as good high-temperature resistance,it is widely used in industry.However,the oxidation failure in extreme environments such as high-temperature and high-speed flame erosion limits its practical application.Surface coating technology is an effective means to improve the high-temperature and ablation resistance of the substrate.Nano-agglomerated powder and conventional micron ZrB_(2)-SiC powder were selected to prepare a composite coating with CoCrAlYTa as the binder layer while ZrB_(2)-SiC as the ceramic layer was prepared by supersonic plasma spraying on the 310S heat-resistant stainless steel matrix,and the oxygen-acetylene high-temperature ablation test was carried out on the two coatings.This was done by using the nano-agglomerated powder and conventional micron commercial ZrB_(2)-SiC powder.The structure of the coating was analyzed by using XRD,SEM,and EDS.The results show that surface pores and micro-cracks of the coating prepared by the nano-agglomerated powder(n-ZS)are much less than that of the micron commercial powder(m-ZS),and the n-ZS coating is denser.The ablation resistance of m-ZS coating was 600 s,it′s 12 times of n-ZS coating.

关 键 词：超音速等离子喷涂 ZrB_(2)-SiC复合涂层 抗烧蚀性能 

分 类 号：TG142.7[一般工业技术—材料科学与工程]