Deposition characteristics of Al-12Si alloy coating fabricated by cold spraying with relatively large powder particles

W. Y. Li; C. Zhang; X. P. Guo; G. Zhang; H. L. Liao; C. Coddet

doi:10.1016/j.apsusc.2007.02.142

Deposition characteristics of Al-12Si alloy coating fabricated by cold spraying with relatively large powder particles

W. Y. Li, C. Zhang, X. P. Guo, G. Zhang, H. L. Liao, C. Coddet

Université de technologie de Belfort Montbéliard

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

In this paper, the microstructure, microhardness and adhesive strength of Al-12Si coating produced by cold spraying were investigated. It is found that a thick, dense and well bonded Al-12Si coating could be produced by cold spraying with a relatively large powder through the control of spray conditions. The critical velocity for large Al-12Si particles was lower than that of small Al-12Si particles. The as-deposited Al-12Si coating had the same crystal structure as Al-12Si powder. The localized interface melting occurred resulting from both the adiabatic shearing upon impact and the thermal effect of hot gas. Some fine Si particles precipitated in α-Al matrix because of the thermal effect of hot gas during coating deposition. The dispersed Si particles in Al-12Si coating improved the coating microhardness.

Original language	English
Pages (from-to)	7124-7130
Number of pages	7
Journal	Applied Surface Science
Volume	253
Issue number	17
DOIs	https://doi.org/10.1016/j.apsusc.2007.02.142
State	Published - 30 Jun 2007
Externally published	Yes

Keywords

Adhesive strength
Al-12Si alloy coating
Cold spraying
Microhardness
Microstructrure

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10.1016/j.apsusc.2007.02.142

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title = "Deposition characteristics of Al-12Si alloy coating fabricated by cold spraying with relatively large powder particles",

abstract = "In this paper, the microstructure, microhardness and adhesive strength of Al-12Si coating produced by cold spraying were investigated. It is found that a thick, dense and well bonded Al-12Si coating could be produced by cold spraying with a relatively large powder through the control of spray conditions. The critical velocity for large Al-12Si particles was lower than that of small Al-12Si particles. The as-deposited Al-12Si coating had the same crystal structure as Al-12Si powder. The localized interface melting occurred resulting from both the adiabatic shearing upon impact and the thermal effect of hot gas. Some fine Si particles precipitated in α-Al matrix because of the thermal effect of hot gas during coating deposition. The dispersed Si particles in Al-12Si coating improved the coating microhardness.",

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AU - Li, W. Y.

AU - Zhang, C.

AU - Guo, X. P.

AU - Zhang, G.

AU - Liao, H. L.

AU - Coddet, C.

PY - 2007/6/30

Y1 - 2007/6/30

N2 - In this paper, the microstructure, microhardness and adhesive strength of Al-12Si coating produced by cold spraying were investigated. It is found that a thick, dense and well bonded Al-12Si coating could be produced by cold spraying with a relatively large powder through the control of spray conditions. The critical velocity for large Al-12Si particles was lower than that of small Al-12Si particles. The as-deposited Al-12Si coating had the same crystal structure as Al-12Si powder. The localized interface melting occurred resulting from both the adiabatic shearing upon impact and the thermal effect of hot gas. Some fine Si particles precipitated in α-Al matrix because of the thermal effect of hot gas during coating deposition. The dispersed Si particles in Al-12Si coating improved the coating microhardness.

AB - In this paper, the microstructure, microhardness and adhesive strength of Al-12Si coating produced by cold spraying were investigated. It is found that a thick, dense and well bonded Al-12Si coating could be produced by cold spraying with a relatively large powder through the control of spray conditions. The critical velocity for large Al-12Si particles was lower than that of small Al-12Si particles. The as-deposited Al-12Si coating had the same crystal structure as Al-12Si powder. The localized interface melting occurred resulting from both the adiabatic shearing upon impact and the thermal effect of hot gas. Some fine Si particles precipitated in α-Al matrix because of the thermal effect of hot gas during coating deposition. The dispersed Si particles in Al-12Si coating improved the coating microhardness.

KW - Adhesive strength

KW - Al-12Si alloy coating

KW - Cold spraying

KW - Microhardness

KW - Microstructrure

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DO - 10.1016/j.apsusc.2007.02.142

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SN - 0169-4332

VL - 253

SP - 7124

EP - 7130

JO - Applied Surface Science

JF - Applied Surface Science

IS - 17

ER -

Deposition characteristics of Al-12Si alloy coating fabricated by cold spraying with relatively large powder particles

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Keywords

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