Composite Powder Production of Intermetallic Compound and Carbide by Mechanical Alloying in Ti-AI-C Ternary Alloy

Kamada Masatomo, Setsuo Takaki, Tokunaga Youichi

研究成果: ジャーナルへの寄稿記事

抄録

Composite powder of intermetallic compound (TiAl) and carbide (TiC) was prepared from elemental powders of titanium, aluminum and graphite by means of mechanical alloying, and the formation process of the composite was investigated in relation to the solid state reactions among the elemental powders. Mixed powders with a chemical composition of Ti-25at%Al-25at%C were mechanically milled in vacuum with centrifugel boll mill. After 10.8ks milling, lamellar structure of titanium and aluminum was formed, and graphite seemed to be finely crushed and included into the powder. The solid state reactions forming the composite microstructure occured after about 12ks milling. At first, finely dispersed graphite reacts with titanium to form TiC, and then local temperature rising caused by the exothermic reaction, Ti + Al.N TiC + 180 kJ/mol, activates the diffusion between titanium and aluminum, which enables the elements to form the intermetallic compound (TiAl). The microstructure of TiC/TiAl composite powder prepared by this process is so fine that the components can not be distinguished with EPMA, although they can be identified by means of X-ray diffraction technics.

元の言語英語
ページ(範囲)830-835
ページ数6
ジャーナルJournal of the Japan Society of Powder and Powder Metallurgy
39
発行部数10
DOI
出版物ステータス出版済み - 1 1 1992

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Ternary alloys
Mechanical alloying
Powders
Intermetallics
Carbides
Titanium
Graphite
Composite materials
Aluminum
Solid state reactions
Microstructure
Exothermic reactions
Lamellar structures
Electron probe microanalysis
Vacuum
X ray diffraction
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

これを引用

Composite Powder Production of Intermetallic Compound and Carbide by Mechanical Alloying in Ti-AI-C Ternary Alloy. / Masatomo, Kamada; Takaki, Setsuo; Youichi, Tokunaga.

:: Journal of the Japan Society of Powder and Powder Metallurgy, 巻 39, 番号 10, 01.01.1992, p. 830-835.

研究成果: ジャーナルへの寄稿記事

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abstract = "Composite powder of intermetallic compound (TiAl) and carbide (TiC) was prepared from elemental powders of titanium, aluminum and graphite by means of mechanical alloying, and the formation process of the composite was investigated in relation to the solid state reactions among the elemental powders. Mixed powders with a chemical composition of Ti-25at{\%}Al-25at{\%}C were mechanically milled in vacuum with centrifugel boll mill. After 10.8ks milling, lamellar structure of titanium and aluminum was formed, and graphite seemed to be finely crushed and included into the powder. The solid state reactions forming the composite microstructure occured after about 12ks milling. At first, finely dispersed graphite reacts with titanium to form TiC, and then local temperature rising caused by the exothermic reaction, Ti + Al.N TiC + 180 kJ/mol, activates the diffusion between titanium and aluminum, which enables the elements to form the intermetallic compound (TiAl). The microstructure of TiC/TiAl composite powder prepared by this process is so fine that the components can not be distinguished with EPMA, although they can be identified by means of X-ray diffraction technics.",
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