Fabrication of Ti2AlC/TiAl Composites Using Cobustion Reaction Process.

• Mabuchi Hiroshi

  Department of Metallurgical Engineering, College of Engineering, University of Osaka Prefecture

• Harada Kozo

  Graduate Student, Department of Metallurgical Engineering, College of Engineering, University of Osaka Prefecture

• Tsuda Hiroshi

  Department of Metallurgical Engineering, College of Engineering, University of Osaka Prefecture

• Nakayama Yutaka

  Department of Metallurgical Engineering, College of Engineering, University of Osaka Prefecture

Abstract

The potential of TiAl as an elevated temperature material is well investigated. However, negligible low-temperature ductility and toughness and low high-temperature strength have limited its practical applications. To improve these properties, this compound was made as a composite material containing a second phase such as Ti₃AlC.<br>In the present study, using elemental powders, combustion reaction was carried out to form intermetallic/ceramic composites in the Ti-Al-C system. As a result, the compact of Ti and Al powders with C powder reacted exothermically to form TiAl and Ti₂AlC with a small amount of Ti₂Al, and the mixture products had a fine distribution of the Ti₂AlC particles in the mastrix TiAl, and the volume fraction of the Ti₂AlC particles depended on the amount of C present. Subsequently, using these reacted products, button ingots were arc-melted to a full density. The resulting Ti₂AlC particles were ellipsoidal or columnar in shape with sizes from 5-15 μm and appeared to be homogeneously distributed. It was found that the composite materials produced have a good toughness and strength at both room and elevated temperatures. Consequently, present investigations have considerable interest as a new combustion reaction process to make a composite material.

Journal

• ISIJ International

  ISIJ International 31 (10), 1272-1278, 1991

  The Iron and Steel Institute of Japan

Keywords

• intermetallic compound
• Ti-Al-C system
• TiAl
• Ti₂AlC
• intermetallic/ceramic composite
• elemental powder
• combustion reaction synthesis
• arc-melt casting
• high temperature material
• toughness improvement

Details

• CRID: 1390001206452049792
• NII Article ID: 130000762788
• DOI: 10.2355/isijinternational.31.1272
• COI: 1:CAS:528:DyaK38XisFOgsA%3D%3D
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/31/10/31_10_1272/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed