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Resistance Behavior to Oxidation and Molten Salt Corro-sion of Supersonic Atmospheric Plasma Sprayed TiB2-SiC Coating
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1.State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;2.The Key Laboratory of Guangdong for Modern Surface Engineering Technology, National Engineering Laboratory for Modern Materials Surface Engineering Technology, Guangdong Institute of New Materials, Guangzhou 510650, China;3.Yunnan Yunlv Yongxin Aluminum Company Limited, Honghe 663000, China

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Guangdong Academy of Sciences Project (2018GDASCX-0402); Yunnan Science and Technology Plan Project (2018IC080); Natural Science Foundation of Hunan Province (2018JJ2524)

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    Abstract:

    The fully-coated TiB2-SiC coating was prepared by supersonic atmospheric plasma spraying (SAPS). The oxidation performance of TiB2-SiC coating at 400 and 800 °C was studied and the oxidation mechanism was investigated. The corrosion resistance of TiB2-SiC coating to aluminum melting salt at 900 °C was studied, and the anti-corrosion mechanism of molten salt was discussed. The results show that the TiB2-SiC coating prepared by SAPS has good anti-oxidation performance. The oxidation rate constant at 400 °C is 1.92×10-5 mg2·cm-4·s-1, and that at 800 °C is 1.82×10-4 mg2·cm-4·s-1. The TiB2-SiC coating prepared by SAPS has good resistance to molten salt corrosion at 900 °C. TiB2-SiC coating maintains a dense structure after molten salt corrosion, and cracking and peeling of the coating do not occur.

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[Zou Ke, Deng Chunming, Zou Jianpeng, Liu Min, Liu Xuezhang, Zhao Ruimin, Li Shunhua, Zhu Renbo, Gao Di. Resistance Behavior to Oxidation and Molten Salt Corro-sion of Supersonic Atmospheric Plasma Sprayed TiB2-SiC Coating[J]. Rare Metal Materials and Engineering,2021,50(8):2670~2677.]
DOI:10.12442/j. issn.1002-185X.20200510

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History
  • Received:July 15,2020
  • Revised:September 16,2020
  • Adopted:October 15,2020
  • Online: September 07,2021
  • Published: August 31,2021