Fabrication and mechanical properties of C/C-HfC-SiC composites

Yuki Yano, Kazuya Wada, Takuya Aoki, Toshio Ogasawara, Shinjiro Umezu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)


Many researchers study on reusable spacecraft/hypersonic aircraft for purpose of new aerospace transportation system. These transport aircraft flies at a speed of more than Mach 5. So researchers are considering the use of scramjet engine. Because this engine uses air as an oxidant and liquid hydrogen as a fuel, the combustion gas temperature is more than 2500°C. So the combustor is required lightweight material and super-heat-resistant material. SiC-based ceramics is used as heat-resistant material in the aerospace field. This material maintain the mechanical properties at high temperatures and has a high oxidation resistance. However, heat resistance temperature of this material is about 1600°C. Therefore, SiC-based ceramics can not be used in an environment of scramjet engine combustor. There are measures with a metal structure that is forcibly cooled by the refrigerant of fuel. Because this structure is very heavy and a complex system, it is difficult to a apply. This study uses the hafnium-based super heat-resistant ceramics that is having a melting point more than 2000°C. Purpose is to develop a new technique for forming the ceramics mainly composed from Hafnium Carbide by melt impregnation to inside C/C composite. Hafnium carbide is very high melting point (3950°C) and has oxidation resistance. In addition, material that has been created evaluate by the tissue changes due to cross-sectional observation and the strength test by three-point bending.

Original languageEnglish
Title of host publicationPrecision Engineering and Nanotechnology V
PublisherTrans Tech Publications Ltd
Number of pages5
ISBN (Print)9783038352112
Publication statusPublished - 2015
Externally publishedYes
Event5th International Conference on Asian Society for Precision Engineering and Nanotechnology, ASPEN 2013 - Taipei, Taiwan, Province of China
Duration: 2013 Nov 122013 Nov 15

Publication series

NameKey Engineering Materials
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795


Conference5th International Conference on Asian Society for Precision Engineering and Nanotechnology, ASPEN 2013
Country/TerritoryTaiwan, Province of China


  • C/C composite
  • HfC
  • High temperature materials
  • SiC
  • Strength

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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