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研究等离子喷涂参数对纳米氧化锆涂层组织结构与涂层热导率的影响,分析涂层中孔隙的形成机制以及孔隙率与涂层热导率的关系。结果表明:在所选用的参数中,氧化锆涂层孔隙率随喷涂能量升高而降低,最低可达8%;并且大孔隙减少;氧化锆涂层600℃的热导率随孔隙率的增加而降低,最低可达0.633W.(m.K)-1。
The effect of plasma spray parameters on the microstructure and thermal conductivity of the nano-zirconia coating was studied. The formation mechanism of the pores in the coating and the relationship between the porosity and the thermal conductivity of the coating were analyzed. The results show that the porosity of zirconia coating decreases with the increase of spraying energy, with the lowest up to 8% and the decrease of macroporosity. The thermal conductivity of zirconia coating at 600 ℃ increases with the increase of porosity While reducing, the lowest up to 0.633W. (MK) -1.