Effects of Substrate Bias Voltage on the Microstructure of Cr-Al-N Coatings

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Abstract:

Cr-Al-N coatings with the thickness of about 2 μm have been prepared by a reactive magnetron sputtering method. The effects of substrate negative bias voltage (VB) on the microstructure and critical failure load have been investigated as the VB varied from 0 to –150 V. With VB increasing, grain size, lattice parameter and microstrain increase. (111) preferred orientation dominates in the coatings deposited under 0 and –50 V, while a (200) preferred orientation developed when VB further raised. The reasons for these variation caused by VB are discussed.

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Key Engineering Materials (Volumes 373-374)

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167-171

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March 2008

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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