摘要
通过双层辉光等离子表面合金化方法,在C/C复合材料表面成功制得铱涂层,并研究了铱涂层相组成和微观结构。铱涂层呈亮银白色,致密且表面光滑均匀,无明显缺陷。XRD和SEM研究表明:铱涂层呈多晶态,晶粒呈簇柱状晶并与C/C复合材料表面垂直,具有嵌入式结构,晶粒平均直径为0.5μm,铱涂层截面呈现明显的柱状晶生长,涂层内部有少量裂纹和针孔但并未贯穿。
Excellent Ir coating was deposited onto the C/C composite substrate by double glow-discharge plasma technique. The coating microstructure and morphology were studied by X-ray diffraction and scanning electron microscopy respectively. The as-prepared Ir coating is poly-crystalline phase, and the coating is composed of a number of irregular shape particles and the average size of these particles is 0. 5 μm in diameter. The columnar crystals are observed perpendicular to the surface through cross-section. Some cracks and some pinholes are also observed, but they did not penetrate to the surface.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2008年第2期30-33,共4页
Aerospace Materials & Technology
关键词
铱涂层
C/C复合材料
双辉等离子
微观结构
Iridium coating, C/C composite, Double glow-discharge, Microstructure
