Thermal Expansion Behavior of SiCP/Aluminum Alloy Composites Fabricated by a Low-Pressure Infiltration Process

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Thermal cycling test was carried out for 20 vol% and 40 vol% SiC particle/Al-4 mass%Cu alloy composites to evaluate the bonding strength of the SiC particle/matrix interface in PRMMC fabricated by a low-pressure infiltration process (LPI process). The SiC particles were distributed homogenously in the specimens and a reaction layer of less than 1 μm thickness was observed at the SiC particle/matrix interface before thermal cycling test. This reaction layer was identified as Al<SUB>4</SUB>C<SUB>3</SUB> formed by the reaction between the alloy melt and SiC particle during infiltration. The θ phase, which might form a coherent interface with Al<SUB>4</SUB>C<SUB>3</SUB>, crystallized around the SiC particles through the Al<SUB>4</SUB>C<SUB>3</SUB> layer. The coefficient of thermal expansion was hardly changed during thermal cycling for both the 20 vol% and 40 vol% SiC particle/Al-Cu composites. No significant change in the microstructure and no detachment at the SiC particle/matrix interface were observed after thermal cycling test. The interfacial structure consisting of SiC, Al<SUB>4</SUB>C<SUB>3</SUB>, θ phase and α-Al in order was considered to exhibit a strong bonding of SiC particles to the matrix. The Vickers microhardness measured on the SiC particles in the specimens having a strongly bound interface show hardness values with a small scatter, while those for the specimens having a weakly bound interface exhibit a large scatter in the hardness values. It is suggested that the bonding strength of the reinforcement particle/matrix interface could be evaluated qualitatively from the Vickers microhardness test.

収録刊行物

  • Materials transactions

    Materials transactions 45(5), 1769-1773, 2004-05-20

    公益社団法人 日本金属学会

参考文献:  16件中 1-16件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10013072065
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    6951696
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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