| DUAN Zhong-qing,ZHANG Bao_xia,WANG Ze_hua.Process Optimization of Plasma Sprayed Cr203-8 %Ti02 Coating[J],37(4):39-41,53 |
| Process Optimization of Plasma Sprayed Cr203-8 %Ti02 Coating |
| Received:March 26, 2008 Revised:August 10, 2008 |
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| DOI： |
| KeyWord:Plasma spray Cr203-8%Ti02 coating Bonding strength Orthogonal experiment |
| Author | Institution |
| DUAN Zhong-qing |
Civil Engineering Department of Chuzhou Vocational and Technical College, Chuzhou , China |
| ZHANG Bao_xia |
Electro Mechanical Engineering Department of Chuzhou Vocational and Technical College, Chuzhou , China |
| WANG Ze_hua |
College of Materials Science and Engineering, Hohai University, Nanjing , China |
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| Abstract: |
| The bonding strength of ceramic coating sprayed by plasma between coating and substrate is small sometimes, this confines its application. An orthogonal test was used to investigate the influence of four main factors of spraying distance, electrical current, primary gas flow rate and secondary gas flow rate on the plasma spraying Cr203-8% Ti02 coating. An optimized plasma spraying parameters of Cr203-8% Ti02 coating was obtained. The bonding strength, hardness and porosity were measured. The result shows that the factors effective sequence on the bonding strength first is spraying distance, then electrical current and secondary gas flow rate, primary gas flow rate at last. The optimized process improves the quality of coating remarkably, and the optimized coating has a bonding strength of 29. 2MPa, porosity of 3. 80% and micro-hardness of 2 528HV. |
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