大气等离子喷涂工艺参数对Al_2O_3涂层性能的影响
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摘要
为了提高燃烧器工艺烧嘴的使用寿命,在UMCo-50基材表面大气等离子喷涂Al_2O_3层。采用正交试验法对喷涂工艺参数进行了优化,运用微观形貌分析、X射线衍射分析并结合强度及显微硬度等测试方法,系统研究了喷涂主气流量、功率和送粉量对Al_2O_3涂层综合性能的影响规律。结果表明:喷涂主气流量、功率和送粉量对Al_2O_3涂层性能具有交互性影响,在40 L/min Ar,48 kW和30 g/min条件下可以获得性能较好的Al_2O_3涂层,极大地提高了UMCo-50基材的抗高温氧化和耐磨性能,使之具有广阔的应用前景。
The work aims to optimize atmospheric plasma spraying process parameters of Al_2O_3 oxide ceramic coatings for the combustion burner( material: UMCo-50). Based on the orthogonal experimental design of the process parameters,the effects of main gas flow,power and powder feeding rate on the properties of atmospheric plasma sprayed Al_2O_3 coatings were systematically studied. The microstructure of powder and coatings was studied by X-ray diffractometer and scanning electron microscope. The bonding strength and cross section hardness of the coatings were measured by tensile machine and Vickers hardness tester. The optimized spraying process parameters were obtained. Results showed that the flow rate of main gas,power and powder feeding rate had the interactive influences on the properties. Under the condition of 40 L/min Ar,48 k W and 30 g/min,the coating with better performance was obtained. Furthermore,the coating greatly improved the high temperature oxidation resistance and the wear resistance of the substrate materials( UMCo-50),which presented the wide application prospect.
The work aims to optimize atmospheric plasma spraying process parameters of Al_2O_3 oxide ceramic coatings for the combustion burner( material: UMCo-50). Based on the orthogonal experimental design of the process parameters,the effects of main gas flow,power and powder feeding rate on the properties of atmospheric plasma sprayed Al_2O_3 coatings were systematically studied. The microstructure of powder and coatings was studied by X-ray diffractometer and scanning electron microscope. The bonding strength and cross section hardness of the coatings were measured by tensile machine and Vickers hardness tester. The optimized spraying process parameters were obtained. Results showed that the flow rate of main gas,power and powder feeding rate had the interactive influences on the properties. Under the condition of 40 L/min Ar,48 k W and 30 g/min,the coating with better performance was obtained. Furthermore,the coating greatly improved the high temperature oxidation resistance and the wear resistance of the substrate materials( UMCo-50),which presented the wide application prospect.
引文
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[8]杨德明,高阳,周起帆,等.微观组织结构对Ni Cr Al Y涂层抗高温氧化性能的影响[J].中国表面工程,2017,30(5):119-125.
[9]王海军.热喷涂材料及应用[M].北京:国防工业出版社,2008.
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[11]王国阳,李利,武笑宇.等离子喷涂氧化铝涂层界面状态和结合性能的研究[J].材料开发与应用,2012,27(3):23-27.
[2]陈萌,刘昌永,周亮,等.等离子喷涂氧化铝基复合涂层研究进展[J].表面技术,2017,46(11):241-247.
[3]NITIN P,PADTURE,MAURICE G,et al.Thermal barrier coatings for gas-turbine engine applications[J].Science,2002,296(5 566):280-284.
[4]ZHANG J X,HE J N,DONG Y C,et al.Microstructure and properties of Al2O3-13%Ti O2coatings sprayed using nanostructured powders[J].Rare Metals,2007,26(4):391-397.
[5]张春子,王卫泽,涂善东.水煤浆喷嘴温度场和应力场分析及涂层材料应用[J].中国表面工程,2010,23(4):70-73.
[6]邓畅光,邓春明,刘敏,等.大气和低压等离子喷涂氧化铝涂层[J].材料工程,2008(5):48-51.
[7]VIJAY KUMAR,BALASUBRAMANIAN K.Progress update on failure mechanisms of advanced thermal barrier coatings:Areview[J].Progress in Organic Coatings,2016,90:54-82.
[8]杨德明,高阳,周起帆,等.微观组织结构对Ni Cr Al Y涂层抗高温氧化性能的影响[J].中国表面工程,2017,30(5):119-125.
[9]王海军.热喷涂材料及应用[M].北京:国防工业出版社,2008.
[10]VURAL M,ZEYTIN S,UCISIK A H.Plasma-sprayed oxide ceramics on steel substrates[J].Surface and Coatings Technology,1997,97:347-354.
[11]王国阳,李利,武笑宇.等离子喷涂氧化铝涂层界面状态和结合性能的研究[J].材料开发与应用,2012,27(3):23-27.