衬底温度对等离子喷涂熔滴扁平化的影响

兵器材料科学与工程 , 2005, 28(2): 35-38. doi: 10.3969/j.issn.1004-244X.2005.02.011

衬底温度对等离子喷涂熔滴扁平化的影响

傅迎庆 ^1, , 高阳 ^2, , 张占平 ^3, , 黑祖昆 ^4,

1.大连海事大学,材料工艺研究所,辽宁,大连,116026

2.大连海事大学,材料工艺研究所,辽宁,大连,116026

3.大连海事大学,材料工艺研究所,辽宁,大连,116026

4.大连海事大学,材料工艺研究所,辽宁,大连,116026

关键词：衬底温度 , Al65Cu20Cr15准晶 , 扁平粒子 , 等离子喷涂

Effect of substrate temperature on the splatting of plasma sprayed droplets

以抛光的 AISI304不锈钢表面 (Ra<0.5 μ m)作为衬底,并在衬底温度分别为 273、298、373、573K的条件下,用低功率等离子喷枪( 2.5～ 8.0 kW)向其表面喷涂 Al65Cu20Cr15准晶粉末,研究准晶熔滴的扁平化行为. SEM的试验结果表明:衬底温度较低时 (273～ 373 K), Al65Cu20Cr15准晶熔滴凝固后的扁平粒子呈现不规则的溅射状,并且衬底温度越低,溅射程度越高;随衬底温度的升高,准晶熔滴在衬底表面的扁平化凝固区域逐步扩大 ;当衬底温度较高时 (>573 K),溅射不再发生,熔滴的扁平粒子呈现规则的圆盘状;将熔滴的扁平粒子由溅射状变为无"喷溅"的圆盘状时的衬底温度定义为转变温度 Tt,Al65Cu20Cr15准晶的 Tt为 573 K左右.

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衬底温度对等离子喷涂熔滴扁平化的影响

Effect of substrate temperature on the splatting of plasma sprayed droplets

参考文献