Thermal Shock Behavior of SiC-AlN/Mo Functionally Graded Materials

Yukihiro Mukaida, Akihiro Fujiwara, Akira Kawasaki, Li Jing-Feng, Ryuzo Watanabe

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The burner heating test was carried out for evaluating the thermomechanical performance of SiC-AlN/Mo Functionally Graded Materials (FGMs) fabricated by powder metallurgical process. The ceramic surface was heated with burner flame and the bottom surface cooled by water flow. The top and bottom surface temperatures and the average heat flux were determined as a function of the power output of burner. Thermal shock damage was monitored with acoustic emission signals liberated from damage initiation and propagation. By increasing the output power of burner stepwisely, a cycle of heating and cooling was repeated until a large damage was detected. The holders made of Ti and Cu were prepared as cooling substrates so as to investigate the influence of the material of the holders on thermal shock damage. The Ti holder was found to contribute the increase of the heat insulating efficiency with effective black radiation from the top surface, which increases remarkably with increase in the surface temperature. The thermal shock damage of the specimen mounted on the Ti holder was observed on the ceramic surface during cooling. The mechanism for this damage formation was found to be very similar to the case of PSZ/Stainless steel functionally graded materials.

Original languageEnglish
Pages (from-to)1394-1399
Number of pages6
Journaljournal of the japan society of powder and powder metallurgy
Volume42
Issue number12
DOIs
Publication statusPublished - 1995 Jan 1

Keywords

  • functionally graded materials
  • heat insulation
  • thermal barrier
  • thermal shock
  • thermal stress

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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