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0.633 W·(m·K)~(-1).
The relationship between the parameters of the plasma spraying as well as the structure and the thermal conductivity of the nano-zirconia coating was researched. The formation mechanism of the pore and the relationship between porosity and thermal conductivity were analyzed. The results showed that as the power of the plasma increased the porosity of the zirconia coating decreased and the number of the big pore of the coating decreased; the lowest value of the porosity is 8%; the thermal conductivity of the coating at 600 ℃ increased as the porosity of the coating decreased; the lowest value of the thermal conductivity is 0.633 W(m·K)~(-1)
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