冷喷涂65%Zn-Al复合涂层的沉积特性

中国有色金属学报, 2010, 20(7): 1353-1359.

冷喷涂65%Zn-Al复合涂层的沉积特性

李海祥 ^1, , 孙明先 ^2, , 李相波 ^3, , 王洪仁 ^4, , 黄国胜 ^5,

1.中船重工七二五所青岛分部,海洋腐蚀与防护国防科技重点实验室,青岛,266071

2.中船重工七二五所青岛分部,海洋腐蚀与防护国防科技重点实验室,青岛,266071

3.中船重工七二五所青岛分部,海洋腐蚀与防护国防科技重点实验室,青岛,266071

4.中船重工七二五所青岛分部,海洋腐蚀与防护国防科技重点实验室,青岛,266071

5.中船重工七二五所青岛分部,海洋腐蚀与防护国防科技重点实验室,青岛,266071

基金项目: 国防重点实验室基金资助项目(9140C2505010605)

关键词： 65％Zn-Al , 涂层 , 沉积特性 , 结合机理 , 冷喷涂

Depositing characteristic of 65%Zn-Al coatings produced by cold gas dynamic spray

以 Zn 和 Al粉末为原料(Zn质量分数为85%),采用冷气动力喷涂方法制备65%Zn-Al 涂层.采用 SEM 和光学显微镜(OM)对涂层的显微组织进行研究,结合 XRD 和 X 射线能谱(EDS)对涂层的沉积特性进行分析.结果表明:在本实验条件下可获得厚度为0.7 mm、孔隙率为1.7%的65%Zn-Al复合涂层;Al 粒子的沉积效率要远高于Zn 粒子的;Zn 和 Al 粒子主要通过塑性变形机械咬合在一起,粒子间结合紧密;交界面处粒子由于连续冲击作用产生破碎细化;涂层显微硬度高于 Zn 和 Al 块材的,涂层的本身强度大于其与基体的结合强度,部分结合面涂层与基体存在元素扩散的现象,组织中未检测到固溶体与化合物相.

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