Joining of alumina by using polycarbosilane and aluminum foil

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  • KITA Ken’ichiro
    National Institute of Advanced Industrial Science and Technology (AIST)
  • KONDO Naoki
    National Institute of Advanced Industrial Science and Technology (AIST)
  • IZUTSU Yasuhisa
    Stereo Fabric Research Association
  • KITA Hideki
    National Institute of Advanced Industrial Science and Technology (AIST)

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This paper describes a novel experiment in which alumina was joined using polycarbosilane (PCS) and an aluminum foil. PCS was used to design the surface structure of alumina, and the aluminum foil enabled the formation of an area that included the alumina surface designed using PCS; this area could be joined to ceramic materials. A four-point bending test revealed that the flexural strength of both the silicon carbide (SiC) and the silicon oxide (SiO2) pieces that were obtained from alumina whose surfaces were modified to SiC or SiO2 increased, compared with the flexural strength of ceramics joined by alternative methods involving the use of organometallic polymers whose compositions are similar to SiC and SiO2. Moreover, it was apparent that alumina was formed by the reaction of SiO2 with aluminum. However, traces of Al and Si remained in the joining area in both the SiC and SiO2 pieces.

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