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首页> 外文期刊>Journal of Materials Engineering and Performance >Thermophysical Properties of Cold- and Vacuum Plasma-Sprayed Cu-Cr-X Alloys, NiAl and NiCrAlY Coatings I: Electrical and Thermal Conductivity, Thermal Diffusivity, and Total Hemispherical Emissivity
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Thermophysical Properties of Cold- and Vacuum Plasma-Sprayed Cu-Cr-X Alloys, NiAl and NiCrAlY Coatings I: Electrical and Thermal Conductivity, Thermal Diffusivity, and Total Hemispherical Emissivity

机译：冷和真空等离子体喷涂的Cu-Cr-X合金的热物理性质，Nial和Nicraly涂层I：电和导热性，热扩散性和总半球发射率

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This two-part paper reports the thermophysical properties of several cold-and vacuum plasma-sprayed monolithic Cu- and Ni-based alloy coatings. Part I presents the electrical and thermal conductivity, thermal diffusivity, and total hemispherical emissivity data, while Part II reports the specific heat capacity data for these coatings. Metallic copper alloys and stoichiometric NiAl and NiCrAlY coatings were fabricated by either the cold spray or the vacuum plasma spray deposition processes for thermal property measurements between 77 and 1223 K. The temperature dependencies of the thermal conductivities, thermal diffusivities, electrical conductivities, and total hemispherical emissivities of these cold- and vacuum-sprayed monolithic coatings are reported in this paper. The electrical and thermal conductivity data correlate reasonably well for Cu-8%Cr-1%Al, Cu-23%Cr-5%Al, and NiAl in accordance with the Wiedemann-Franz (WF) law although a better fit is obtained using the Smith-Palmer relationship. The Lorentz numbers determined from the WF law are close to the theoretical value.
机译：这篇两篇纸张报道了几种冷和真空等离子体喷涂整体式Cu-和Ni基合金涂层的热物理性质。第一部分呈现电和导热性，热扩散率和总半球发射率数据，而第二部分报告了这些涂层的具体热容量数据。通过冷喷雾或真空等离子体喷雾沉积工艺制造金属铜合金和化学计量的NiAl和Nicraly涂层，用于在77和1223K之间的热性能测量。热导体的温度依赖性，热扩散性，电导率和总半球形的温度依赖性本文报道了这些冷和真空喷涂整体涂层的发射性。对于Cu-8％Cr-1％Al，Cu-23％Cr-5％Al，Cu-23％Cr-5％Al和Nial根据Wiedemann-Franz（WF）定律，电导率良好地相关，尽管使用更好的拟合史密斯帕尔默的关系。从WF法确定的Lorentz数字接近理论值。

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