High temperature oxidation properties of laser clad composite coatings on TiAl intermetallic alloy

Xiu Bo Liu; Hua Ming Wang

High temperature oxidation properties of laser clad 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

4 Scopus citations

Abstract

γ-NiCrAl/Cr₇C₃/TiC composite coatings were fabricated on γ-TiAl intermetallic alloy by laser cladding with NiCr-Cr₃C₂ precursor mixed powders. The elevated-temperature isothermal oxidation-resistance was conducted in a high-temperature electric resistance furnace at 1000°C for 50 h in air. The corresponding oxidation mechanisms were also discussed based on the experimental results. The results show that the isothermal elevated-temperature (1000°C) oxidation resistance of the laser clad composite coatings is enhanced significantly and the relatively continuous oxide scales consist of Al₂O₃, Cr₂O₃ and TiO₂. While the original TiAl alloy has poor elevated-temperature oxidation resistance and the oxide scales are brittle and porous and are mainly composed of TiO₂ in the top layer oxide scale and TiO₂+α-Al₂O₃ near the scale/substrate.

Original language	English
Pages (from-to)	32-35
Number of pages	4
Journal	Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment
Volume	26
Issue number	5
State	Published - Oct 2005

Keywords

Composite coating
High-temperature oxidation resistance
Laser cladding
TiAl intermetallic alloy

Cite this

@article{cb334be68c384ad68593547542cd2ad6,

title = "High temperature oxidation properties of laser clad composite coatings on TiAl intermetallic alloy",

abstract = "γ-NiCrAl/Cr7C3/TiC composite coatings were fabricated on γ-TiAl intermetallic alloy by laser cladding with NiCr-Cr3C2 precursor mixed powders. The elevated-temperature isothermal oxidation-resistance was conducted in a high-temperature electric resistance furnace at 1000°C for 50 h in air. The corresponding oxidation mechanisms were also discussed based on the experimental results. The results show that the isothermal elevated-temperature (1000°C) oxidation resistance of the laser clad composite coatings is enhanced significantly and the relatively continuous oxide scales consist of Al2O3, Cr2O3 and TiO2. While the original TiAl alloy has poor elevated-temperature oxidation resistance and the oxide scales are brittle and porous and are mainly composed of TiO2 in the top layer oxide scale and TiO2+α-Al2O3 near the scale/substrate.",

keywords = "Composite coating, High-temperature oxidation resistance, Laser cladding, TiAl intermetallic alloy",

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

year = "2005",

month = oct,

language = "英语",

volume = "26",

pages = "32--35",

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

issn = "1009-6264",

publisher = "Chinese Mechanical Engineering Society",

number = "5",

}

TY - JOUR

T1 - High temperature oxidation properties of laser clad composite coatings on TiAl intermetallic alloy

AU - Liu, Xiu Bo

AU - Wang, Hua Ming

PY - 2005/10

Y1 - 2005/10

N2 - γ-NiCrAl/Cr7C3/TiC composite coatings were fabricated on γ-TiAl intermetallic alloy by laser cladding with NiCr-Cr3C2 precursor mixed powders. The elevated-temperature isothermal oxidation-resistance was conducted in a high-temperature electric resistance furnace at 1000°C for 50 h in air. The corresponding oxidation mechanisms were also discussed based on the experimental results. The results show that the isothermal elevated-temperature (1000°C) oxidation resistance of the laser clad composite coatings is enhanced significantly and the relatively continuous oxide scales consist of Al2O3, Cr2O3 and TiO2. While the original TiAl alloy has poor elevated-temperature oxidation resistance and the oxide scales are brittle and porous and are mainly composed of TiO2 in the top layer oxide scale and TiO2+α-Al2O3 near the scale/substrate.

AB - γ-NiCrAl/Cr7C3/TiC composite coatings were fabricated on γ-TiAl intermetallic alloy by laser cladding with NiCr-Cr3C2 precursor mixed powders. The elevated-temperature isothermal oxidation-resistance was conducted in a high-temperature electric resistance furnace at 1000°C for 50 h in air. The corresponding oxidation mechanisms were also discussed based on the experimental results. The results show that the isothermal elevated-temperature (1000°C) oxidation resistance of the laser clad composite coatings is enhanced significantly and the relatively continuous oxide scales consist of Al2O3, Cr2O3 and TiO2. While the original TiAl alloy has poor elevated-temperature oxidation resistance and the oxide scales are brittle and porous and are mainly composed of TiO2 in the top layer oxide scale and TiO2+α-Al2O3 near the scale/substrate.

KW - Composite coating

KW - High-temperature oxidation resistance

KW - Laser cladding

KW - TiAl intermetallic alloy

UR - https://www.scopus.com/pages/publications/28244436444

M3 - 文章

AN - SCOPUS:28244436444

SN - 1009-6264

VL - 26

SP - 32

EP - 35

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

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

IS - 5

ER -

High temperature oxidation properties of laser clad composite coatings on TiAl intermetallic alloy

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