| 摘要: |
| 采用预涂Nocolok®钎剂的方法对ZL101基材进行等离子喷涂前的表面预处理,结合对基材界面温度的计算,分析了钎剂预处理提高涂层结合强度的作用机理,并通过正交试验研究了喷涂工艺参数对Ni5Al涂层结合强度的影响.结果表明,表面预涂钎剂可显著提高基材与Ni5Al涂层的结合强度,喷涂粒子及基材表面的温度对界面产生冶金结合起到了决定性的作用;当喷涂距离为120mm,钎剂预涂量80mg/cm2,预热温度为573K时,Ni5Al涂层的结合强度最高。 |
| 关键词: 等离子喷涂 钎剂预处理 正交优化 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(50805002);留学人员回国启动基金 |
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| Effect of flux surface preparation on coating bonding strength |
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LI Hui, ZHENG Lijun, WEI Qi, LI Zhuoxin
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College of Material Science and Engineering, Beijing University of Technology, Beijing 100124, China
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| Abstract: |
| Flux surface preparation on ZL101 substrate was carried out to form Ni5Al coating by plasma spray.The mechanism of the coating was analyzed by calculation for interfacial temperature.The effect of process parameters on bonding strength of the coating was studied by three-factor,three-level orthogonal experiments.The results show that preplacing flux prior to spraying can substantially improve the adhesion of the coating,and the temperature of sprayed particles and the substrate temperature play determinative roles in the interfacial bonding.The optimal process parameters are the spray distance of 120 mm,the specific quantity of prelaid flux of 80 mg/cm2 and the preheating temperature of 573 K. |
| Key words: plasma spray flux surface preparation orthogonal optimization |
