期刊
METALS AND MATERIALS INTERNATIONAL
卷 22, 期 2, 页码 324-331出版社
KOREAN INST METALS MATERIALS
DOI: 10.1007/s12540-016-5452-8
关键词
composites; infiltration; wetting; image analysis; kinetics
资金
- Fundamental R&D Program for Core Technology of Materials - Ministry of Knowledge Economy, Republic of Korea [10037308]
Aluminum matrix composites with a high volume fraction of B4C and TiB2 were fabricated by a novel processing technique- a quick spontaneous infiltration process. The process combines a pressureless infiltration with the combustion reaction of Al-Ti-B4C-CuO in molten aluminum. The process is realized in a simple and economical way in which the whole process is performed in air in a few minutes. To verify the rapidity of the process, the infiltration kinetics was calculated based on the Washburn equation in which melt flows into a porous skeleton. However, there was a noticeable deviation from the calculated results with the experimental results. Considering the cross-sections of the samples at different processing times, a new infiltration model (two step infiltration) consisting of macro-infiltration and micro-infiltration is suggested. The calculated kinetics results in light of the proposed model agree well with the experimental results.
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