In situ processing for TiC-Al composite by dipping exothermic reaction process = 용탕 함침 공정에 의한 in situ TiC-Al 복합재료 제조에 관한 연구

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Owing to the rapid advancement of composite materials technology, composites are not only replacing conventional materials in many applications but also creating new areas unique to themselves. In recent year, Metal/ceramic composites are even more attractive because they have improved properties over conventional materials and are relatively simple to fabricate. Recently, in situ processes for metal matrix composites have emerged as novel processing techniques. In situ techniques involve a chemical reaction resulting in the formation of a very fine and thermodynamically stable reinforcing ceramic phase within a metal matrix. In particular, the reinforcement surfaces are likely to be free from contamination and a strong bonding between matrix and reinforcement can be achieved. Aluminum composites have a great potential because of their high strength-to-weight ratio. The TiC-Al composite system has been studied by a number of researchers, which shows high strength, high wear resistance and high stiffness. The TiC-Al composite can be made either by adding TiC powders directly to the melt, or by in situ reactions between carbon sources such as $Al_4C_3$ particles and $CH_4$ gas in Al-Ti melts. In addition, the XD process could make the in situ TiC-Al composite by using an exothermic reaction. It is well known that the strength of metal matrix composites can be increased by suitably controlling the dispersion parameter, i.e. either by increasing the volume fraction or by decreasing the particle size of reinforcement. However, the processing of composites with high volume fractions (greater than 30vol.%) of reinforcements is difficult and usually lead to structures with defects (cavities and cracks). In this Ph.D. thesis, it was suggested that high volume TiC reinforced aluminum composites could be synthesized by using a dipping exothermic reaction process (DERP) as a newly suggested process technique. DERP involves exothermic reactions like other in-s...
Advisors
Kim, Do-Kyungresearcher김도경researcher
Description
한국과학기술원 : 재료공학과,
Publisher
한국과학기술원
Issue Date
2003
Identifier
181099/325007 / 000985187
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 재료공학과, 2003.2, [ xiii, 155 p. ]

Keywords

TiC; Dipping Exothermic Reaction Process; Composite; Al; 알루미늄; 티타늄 카바이드; 용탕함침공정; 복합재료

URI
http://hdl.handle.net/10203/50294
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=181099&flag=dissertation
Appears in Collection
MS-Theses_Ph.D.(박사논문)
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