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Oxidation Resistance and Insulation of AlPO4/Al2O3 Coating on Tungsten Substrate at High Temperature

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Abstract:

To improve the oxidation resistance and insulation of tungsten electronic device at high temperature, an AlPO4/Al2O3 composite coating was synthesized on the tungsten substrate by sol-gel method. The morphology of coating was investigated by scanning electron microscopy (SEM). Compared to the blank specimens, the coated ones exhibit excellent oxidation resistance and insulation at about 1100, which can be attributed to the compact coating without porosity and crack. Up to 1200, the effects of coating became dramatically poor. The electron conductivity mechanism was discussed.

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2016 International Conference on Advanced Material Research and Application View Preview

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Periodical:

Advanced Materials Research (Volume 1142)

Pages:

168-172

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1142.168

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Online since:

January 2017

Authors:

Ai Ling Fan, Ying Kun Xue, Wei Tian Li

Keywords:

Al2O3 Composite Coating, Sol-Gel, Tungsten Substrate

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