首页|Thermal Stablility and Oxidation Resistance of CrAISiN Nano-structured Coatings Deposited by Lateral Rotating Cathode Arc

Thermal Stablility and Oxidation Resistance of CrAISiN Nano-structured Coatings Deposited by Lateral Rotating Cathode Arc

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  • NETL
  • NSTL
  • Trans Tech Publications Ltd
In this paper, CrAlSiN coatings are deposited by a lateral rotating cathode arc technique. The high temperature oxidation behaviors of these coatings are studied in ambient atmosphere at temperatures ranging from 800℃-1000℃ for an hour. The ternary TiAlN coating is used as the benchmark in this study. The surface morphology and chemical composition of the coating samples before and after oxidation at different temperatures are analyzed by scanning electron microscopy (SEM) equipped by energy dispersive X-ray spectrometer (EDX), glow discharge optical spectrometry (GDOS) and X-ray diffraction (XRD). The CrAISiN coatings show much better oxidation resistance than the TiAIN coatings. TiAlN starts to oxidize from 800℃ and forms a complete surface oxide layer after oxidation at 1000℃ for an hour. However, CrAISiN shows a relatively good oxidation resistance below 1000℃ and only is oxidized to form a thin oxide scale with a thickness of 0.3 μm at 1000℃ for one hour. It is found that the oxidation of both coatings is triggered from the surface metallic droplets generated by the arc deposition process.

nano-structured coatingoxidation resistanceCrAlSiN

Jhun Yew Cheong、X. Z. Ding、Beng Kang Tay、X. T. Zeng

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Surface Technology Group, Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075 School of Electrical and Electronics Engineering, Nanyang Technological University, Singapore, 50 Nanyang Avenue, Singapore 639798

Surface Technology Group, Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075

School of Electrical and Electronics Engineering, Nanyang Technological University, Singapore, 50 Nanyang Avenue, Singapore 639798

2010

10.4028/www.scientific.net/KEM.447-448.725

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.447/448
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