公开(公告)号：US20010026868A1

公开(公告)日：2001-10-04

申请号：US09847436

申请日：2001-05-03

Applicant: NGK Insulators, Ltd.

Inventor： Shigeru Hanzawa ,  Masatoshi Futakawa ,  Saburo Shimizu ,  Kaoru Onuki ,  Ikuo Ioka ,  Ynte Johan Stockmann

IPC: B05D003/02 ,  B32B009/00

CPC classification number: C04B35/806 ,  B32B18/00 ,  C04B35/565 ,  C04B35/573 ,  C04B35/62281 ,  C04B35/62695 ,  C04B2235/3826 ,  C04B2235/3895 ,  C04B2235/422 ,  C04B2235/428 ,  C04B2235/483 ,  C04B2235/5244 ,  C04B2235/5256 ,  C04B2235/5427 ,  C04B2235/5436 ,  C04B2235/5472 ,  C04B2235/604 ,  C04B2235/656 ,  C04B2235/658 ,  C04B2235/6581 ,  C04B2235/6586 ,  C04B2235/75 ,  C04B2235/77 ,  C04B2235/96 ,  C04B2235/9684 ,  C04B2237/365 ,  C04B2237/38 ,  C04B2237/586 ,  C04B2237/588 ,  C04B2237/61 ,  Y10T428/24942 ,  Y10T428/249928 ,  Y10T428/249953 ,  Y10T428/249961 ,  Y10T428/249969 ,  Y10T428/249986 ,  Y10T428/24999

Abstract: A SinullSiC material of Si concentration-gradient type is obtained by melt-infiltrating Si into a molded material comprising SiC particles. The SinullSiC material has a porosity of 1.0% or less and in the SinullSiC material the Si concentration decreases gradually from the surface layer towards the innermost layer. A SiC fiber-reinforced SinullSiC composite material of Si concentration-gradient type is obtained by melt-infiltrating Si into a molded material comprising a SiC fiber and SiC particles. The composite material has a porosity of 1.0% or less and in the composite material the Si concentration decreases gradually from the surface layer towards the innermost layer. These materials are significantly improved in corrosion resistance in highly oxidative and corrosive environment, strength, and healability of defects of surface layer and innermost layer.