Thermal transport properties of thermally sprayed coatings
Thermal transport properties of thermally sprayed coatings
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DOI：
10.1179/imr.1992.37.1.271
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发表时间：
1992-01
影响因子：
16.1
通讯作者：
L. Pawłowski;P. Fauchais
中科院分区：
文献类型：
--
作者：
L. Pawłowski;P. Fauchais
本文综述了热喷涂金属和陶瓷材料的热物理性能。讨论的属性是温度依赖的热导率，扩散率，比热，特定的质量，和发射率，这是先决条件，以解决微分热传导方程及其相关的边界条件。这些系数针对陶瓷进行评估，例如用各种氧化物（Y2 O3、CaO、MgO、SiO2、SrO 2）、Al 2 O3和Cr2 O3稳定的ZrO 2;金属，例如Mo;合金，例如Ni-Cr、Ni-Al、Ni-Cr-Al、Ni-Cr-Al-Y、Ni-Co-Cr-Al-Y;以及最后，金属陶瓷Mo-ZrO 2和Ni-Al-ZrO 2。陶瓷涂层（ZrO 2）和金属粘结层（Mo或Ni-Al）之间的接触热阻也估计。这些热物理系数与用于热喷涂的材料的某些特性、涂层沉积过程的操作条件、喷涂材料的微观结构以及其它相关性能相关。简要讨论了热传导过程的基本原理和热物理性质研究的方法。最后，给出了热传导方程解的几个例子，描述了热喷涂涂层的典型技术应用。
This review is concerned with the thermophysical properties of thermally sprayed metallic and ceramic materials. The properties discussed are the temperature dependent thermal conductivity, diffusivity, specific heat, specific mass, and emissivity which are prerequisites to solve the differential heat conduction equation with its related boundary conditions. These coefficients are evaluated for ceramics such as ZrO2 stabilised with various oxides (Y2O3, CaO, MgO, SiO2, SrO2), Al2O3, and Cr2O3: metals such as Mo; alloys such as Ni-Cr, Ni-Al, Ni-Cr-Al, Ni-Cr-Al-Y, Ni-Co-Cr-Al-Y; and, finally, the cermets Mo-ZrO2 and Ni-Al-ZrO2. A thermal contact resistance between ceramic coating (ZrO2) and metallic bond layer (Mo or Ni-Al) is also estimated. These thermophysical coefficients are correlated with some characteristics of the materials used for thermal spraying, with the operating conditions of coatings' deposition process and with the microstructure of the sprayed material as well as other related properties. The fundamentals of the heat conduction process, and the methods used for the thermophysical properties investigations are briefly discussed. Finally, a few examples of the heat conduction equation solution, describing typical technological applications of thermally sprayed coatings, are given.