A protective SiAlN coating on topographic surface of laser powder bed fusion manufactured Ti alloy

Gao, Zhaohe, Zhang, Xun, Cao, Sheng, Kulczyk-Malecka, Justyna ORCID: https://orcid.org/0000-0002-4905-3635, Qin, Shiying, Liu, Xiaodong, Kelly, Peter ORCID: https://orcid.org/0000-0003-1008-4941, Wu, Xinhua, Xiao, Ping and Chiu, Yu-Lung (2023) A protective SiAlN coating on topographic surface of laser powder bed fusion manufactured Ti alloy. Corrosion Science, 219. p. 111250. ISSN 0010-938X

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Official URL: https://doi.org/10.1016/j.corsci.2023.111250

Abstract

Protective SiAlN coating with Mo interlayer has been directly deposited onto as-built topographic surface of laser-based powder bed fusion manufactured Ti6Al4V alloy where high surface roughness, even with irregular geometrical features and native oxide scale on it. The topographic surface of Ti6Al4V is well protected by SiAlN/Mo coatings without spallation, cracks or even oxidation after 50 h of exposure at 800 °C for 10 cycles in air. The conformal nature of sputtered SiAlN/Mo coatings enables topographic surface to be well covered, and Mo diffuses through thin native oxide scale on topographic surface into Ti alloy, thereby forming strong chemical bonding between coatings and Ti substrates.

Item Type:	Article
Peer-reviewed:	Yes
Date Deposited:	26 May 2023 08:42
Publisher:	Elsevier
Additional Information:	This is an Accepted Manuscript of an article which appeared in final form in Corrosion Science, published by Elsevier
Divisions:	Faculties > Science and Engineering
Subject terms:	0905 Civil Engineering, 0912 Materials Engineering, 0913 Mechanical Engineering, Energy
Data Access Statement:	Data will be made available on request.
URI:	https://e-space.mmu.ac.uk/id/eprint/631978
DOI:	https://doi.org/10.1016/j.corsci.2023.111250
ISSN	0010-938X

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