Microstructure and reaction process of in-situ Ti2AlC/TiAl composite

Lingxiao Zeng; Hui Chang; Rui Hu; Tiebang Zhang; Jinshan Li

Microstructure and reaction process of in-situ Ti₂AlC/TiAl composite

Lingxiao Zeng, Hui Chang, Rui Hu, Tiebang Zhang, Jinshan Li

Northwestern Polytechnical University Xian

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

3 Scopus citations

Abstract

Ti₂AlC/TiAl composite was prepared with self-propagating high-temperature synthesis (SHS) followed by vacuum arc melting using Ti, Al powers and short carbon fibers as raw materials. Precipitated phases and formed microstructures of Ti₂AlC/TiAl composite were investigated by means of X-ray diffraction, scanning electron microscope and transmission electron microscopy, and the reaction process was also discussed. Results show the microstructure of as-cast Ti₂AlC/TiAl composite is composed of Ti₂AlC, TiAl and Ti₃Al phases, the matrix are mainly of α₂(Ti₃Al)+γ(TiAl) phases with lamellar structure and γ(TiAl) phase with equiaxed structure, and the precipitated in-situ Ti₂AlC short fibers or particles dispersively distribute in the matrix. Ti₃Al phase is decomposed to TiAl and Ti₂AlC particles after annealed at 1200°C for 4 h, and the Ti₂AlC short fibers are enlarged and secondary Ti₂AlC is precipitated after the annealing treatment.

Original language	English
Pages (from-to)	785-788
Number of pages	4
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	42
Issue number	4
State	Published - Apr 2013
Externally published	Yes

Keywords

In-situ
Microstructure
Reaction process
TiAlC/TiAl composite

Cite this

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title = "Microstructure and reaction process of in-situ Ti2AlC/TiAl composite",

abstract = "Ti2AlC/TiAl composite was prepared with self-propagating high-temperature synthesis (SHS) followed by vacuum arc melting using Ti, Al powers and short carbon fibers as raw materials. Precipitated phases and formed microstructures of Ti2AlC/TiAl composite were investigated by means of X-ray diffraction, scanning electron microscope and transmission electron microscopy, and the reaction process was also discussed. Results show the microstructure of as-cast Ti2AlC/TiAl composite is composed of Ti2AlC, TiAl and Ti3Al phases, the matrix are mainly of α2(Ti3Al)+γ(TiAl) phases with lamellar structure and γ(TiAl) phase with equiaxed structure, and the precipitated in-situ Ti2AlC short fibers or particles dispersively distribute in the matrix. Ti3Al phase is decomposed to TiAl and Ti2AlC particles after annealed at 1200°C for 4 h, and the Ti2AlC short fibers are enlarged and secondary Ti2AlC is precipitated after the annealing treatment.",

keywords = "In-situ, Microstructure, Reaction process, TiAlC/TiAl composite",

author = "Lingxiao Zeng and Hui Chang and Rui Hu and Tiebang Zhang and Jinshan Li",

year = "2013",

month = apr,

language = "英语",

volume = "42",

pages = "785--788",

journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

issn = "1002-185X",

publisher = "Science China Press",

number = "4",

}

TY - JOUR

T1 - Microstructure and reaction process of in-situ Ti2AlC/TiAl composite

AU - Zeng, Lingxiao

AU - Chang, Hui

AU - Hu, Rui

AU - Zhang, Tiebang

AU - Li, Jinshan

PY - 2013/4

Y1 - 2013/4

N2 - Ti2AlC/TiAl composite was prepared with self-propagating high-temperature synthesis (SHS) followed by vacuum arc melting using Ti, Al powers and short carbon fibers as raw materials. Precipitated phases and formed microstructures of Ti2AlC/TiAl composite were investigated by means of X-ray diffraction, scanning electron microscope and transmission electron microscopy, and the reaction process was also discussed. Results show the microstructure of as-cast Ti2AlC/TiAl composite is composed of Ti2AlC, TiAl and Ti3Al phases, the matrix are mainly of α2(Ti3Al)+γ(TiAl) phases with lamellar structure and γ(TiAl) phase with equiaxed structure, and the precipitated in-situ Ti2AlC short fibers or particles dispersively distribute in the matrix. Ti3Al phase is decomposed to TiAl and Ti2AlC particles after annealed at 1200°C for 4 h, and the Ti2AlC short fibers are enlarged and secondary Ti2AlC is precipitated after the annealing treatment.

AB - Ti2AlC/TiAl composite was prepared with self-propagating high-temperature synthesis (SHS) followed by vacuum arc melting using Ti, Al powers and short carbon fibers as raw materials. Precipitated phases and formed microstructures of Ti2AlC/TiAl composite were investigated by means of X-ray diffraction, scanning electron microscope and transmission electron microscopy, and the reaction process was also discussed. Results show the microstructure of as-cast Ti2AlC/TiAl composite is composed of Ti2AlC, TiAl and Ti3Al phases, the matrix are mainly of α2(Ti3Al)+γ(TiAl) phases with lamellar structure and γ(TiAl) phase with equiaxed structure, and the precipitated in-situ Ti2AlC short fibers or particles dispersively distribute in the matrix. Ti3Al phase is decomposed to TiAl and Ti2AlC particles after annealed at 1200°C for 4 h, and the Ti2AlC short fibers are enlarged and secondary Ti2AlC is precipitated after the annealing treatment.

KW - In-situ

KW - Microstructure

KW - Reaction process

KW - TiAlC/TiAl composite

UR - http://www.scopus.com/inward/record.url?scp=84877918574&partnerID=8YFLogxK

M3 - 文章

AN - SCOPUS:84877918574

SN - 1002-185X

VL - 42

SP - 785

EP - 788

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 4

ER -

Microstructure and reaction process of in-situ Ti₂AlC/TiAl composite

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Keywords

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