热加工工艺
熱加工工藝
열가공공예
HOT WORKING TECHNOLOGY
2009年
20期
112-114
,共3页
热障涂层%微弧等离子喷涂%ZrO_2%La_2Zr_2O_7%梯度涂层%显微结构
熱障塗層%微弧等離子噴塗%ZrO_2%La_2Zr_2O_7%梯度塗層%顯微結構
열장도층%미호등리자분도%ZrO_2%La_2Zr_2O_7%제도도층%현미결구
thermal barrier coatings%micro-arc plasma spray%ZrO_2%La_2Zr_2O_7%graded coatings%microstructure
采用微弧等离子喷涂设备在1Cr18Ni9上制备了ZrO_2、La_2Zr_2O_7梯度热障涂层;利用扫描电镜研究了涂层的显微结构.结果表明:梯度涂层呈典型的层状结构,涂层较为致密,空隙均匀,同时分布有各向的微裂纹.涂层中分布有未完全融化的La_2Zr_2O_7颗粒,保留了其喷涂前的纳米结构.ZrO_2、La_2Zr_2O_7两种材料在涂层中的熔合较好,结合较为紧密,这对提高涂层的结合强度是非常有益的.
採用微弧等離子噴塗設備在1Cr18Ni9上製備瞭ZrO_2、La_2Zr_2O_7梯度熱障塗層;利用掃描電鏡研究瞭塗層的顯微結構.結果錶明:梯度塗層呈典型的層狀結構,塗層較為緻密,空隙均勻,同時分佈有各嚮的微裂紋.塗層中分佈有未完全融化的La_2Zr_2O_7顆粒,保留瞭其噴塗前的納米結構.ZrO_2、La_2Zr_2O_7兩種材料在塗層中的鎔閤較好,結閤較為緊密,這對提高塗層的結閤彊度是非常有益的.
채용미호등리자분도설비재1Cr18Ni9상제비료ZrO_2、La_2Zr_2O_7제도열장도층;이용소묘전경연구료도층적현미결구.결과표명:제도도층정전형적층상결구,도층교위치밀,공극균균,동시분포유각향적미렬문.도층중분포유미완전융화적La_2Zr_2O_7과립,보류료기분도전적납미결구.ZrO_2、La_2Zr_2O_7량충재료재도층중적용합교호,결합교위긴밀,저대제고도층적결합강도시비상유익적.
ZrO_2 and La_2Zr_2O_7 graded coatings was prepared on 1Cr18Ni9 substrate metal by micro-arc plasma spraying process. Its microstructure characteristics were studied by SEM. The results show that the graded thermal barrier coatings have typical lamellar structure. The coatings are compact. Some pores and micro-cracks are dispersed in the coatings. There are some unmelten La_2Zr_2O_7 particles which have nano-structure. ZrO_2 and La_2Zr_2O_7 melt down and bond each other in the coatings, which is in great favor of enhancing the adherent strength of the coatings.
