Study on the microstructure of laser clad metallic silicide composite coatings on TiAl intermetallic alloy

Xiu Bo Liu; Hua Ming Wang

Study on the microstructure of laser clad metallic silicide composite coatings on TiAl intermetallic alloy

Xiu Bo Liu^*
, Hua Ming Wang

^*Corresponding author for this work

School of Materials Science and Engineering

Zhongyuan University of Technology

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

Abstract

γ-NiCrAl/Ti₅Si₃/TiSi composite coatings were fabricated on γ-TiAl intermetallic alloy by laser cladding pre-placed with NiCr-Si mixed powders. The microstructure of the laser clad metallic silicide composite coatings are characterized as function of constitution of the mixed precursor powders and their microstructural evolution process are discussed. The results show that microstructure of the laser clad composite coatings consists of primary blocky Ti₅Si₃ and dot-like γ/TiSi eutectics and is metallurgically bonded to the TiAl substrate. The volume fraction of the primary Ti₅Si₃ reinforced blocks and the microhardness of the laser clad composite coatings increases with the increasing of Si content in the mixed powder pre-coatings.

Original language	English
Pages (from-to)	127-130
Number of pages	4
Journal	Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
Volume	26
Issue number	6
State	Published - Dec 2005

Keywords

Composite coating
Laser cladding
Metallic silicide
Microstructure
TiAl intermetallic alloy

Cite this

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title = "Study on the microstructure of laser clad metallic silicide composite coatings on TiAl intermetallic alloy",

abstract = "γ-NiCrAl/Ti5Si3/TiSi composite coatings were fabricated on γ-TiAl intermetallic alloy by laser cladding pre-placed with NiCr-Si mixed powders. The microstructure of the laser clad metallic silicide composite coatings are characterized as function of constitution of the mixed precursor powders and their microstructural evolution process are discussed. The results show that microstructure of the laser clad composite coatings consists of primary blocky Ti5Si3 and dot-like γ/TiSi eutectics and is metallurgically bonded to the TiAl substrate. The volume fraction of the primary Ti5Si3 reinforced blocks and the microhardness of the laser clad composite coatings increases with the increasing of Si content in the mixed powder pre-coatings.",

keywords = "Composite coating, Laser cladding, Metallic silicide, Microstructure, TiAl intermetallic alloy",

author = "Liu, \{Xiu Bo\} and Wang, \{Hua Ming\}",

year = "2005",

month = dec,

language = "英语",

volume = "26",

pages = "127--130",

journal = "Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment",

issn = "1009-6264",

publisher = "Chinese Mechanical Engineering Society",

number = "6",

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TY - JOUR

T1 - Study on the microstructure of laser clad metallic silicide composite coatings on TiAl intermetallic alloy

AU - Liu, Xiu Bo

AU - Wang, Hua Ming

PY - 2005/12

Y1 - 2005/12

N2 - γ-NiCrAl/Ti5Si3/TiSi composite coatings were fabricated on γ-TiAl intermetallic alloy by laser cladding pre-placed with NiCr-Si mixed powders. The microstructure of the laser clad metallic silicide composite coatings are characterized as function of constitution of the mixed precursor powders and their microstructural evolution process are discussed. The results show that microstructure of the laser clad composite coatings consists of primary blocky Ti5Si3 and dot-like γ/TiSi eutectics and is metallurgically bonded to the TiAl substrate. The volume fraction of the primary Ti5Si3 reinforced blocks and the microhardness of the laser clad composite coatings increases with the increasing of Si content in the mixed powder pre-coatings.

AB - γ-NiCrAl/Ti5Si3/TiSi composite coatings were fabricated on γ-TiAl intermetallic alloy by laser cladding pre-placed with NiCr-Si mixed powders. The microstructure of the laser clad metallic silicide composite coatings are characterized as function of constitution of the mixed precursor powders and their microstructural evolution process are discussed. The results show that microstructure of the laser clad composite coatings consists of primary blocky Ti5Si3 and dot-like γ/TiSi eutectics and is metallurgically bonded to the TiAl substrate. The volume fraction of the primary Ti5Si3 reinforced blocks and the microhardness of the laser clad composite coatings increases with the increasing of Si content in the mixed powder pre-coatings.

KW - Composite coating

KW - Laser cladding

KW - Metallic silicide

KW - Microstructure

KW - TiAl intermetallic alloy

UR - https://www.scopus.com/pages/publications/33644845636

M3 - 文章

AN - SCOPUS:33644845636

SN - 1009-6264

VL - 26

SP - 127

EP - 130

JO - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

JF - Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment

IS - 6

ER -

Study on the microstructure of laser clad metallic silicide composite coatings on TiAl intermetallic alloy

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Keywords

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