Title of article :
Properties of multilayered mullite/Mo functionally graded materials fabricated by powder metallurgy processing
Author/Authors :
Gang Jin، نويسنده , , Makoto Takeuchi، نويسنده , , Sawao Honda، نويسنده , , Tadahiro Nishikawa، نويسنده , , Hideo Awaji، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2005
Abstract :
Mullite/Mo functionally graded material (FGM) was developed with a powder metallurgy process. Microscopic observations revealed that the microstructure of the mullite/Mo FGM had a gradual stepwise variation. The thermomechanical properties of the mullite/Mo system had graded distributions that depend on the composition variation across the thickness. Thermal shock tests were done on the FGMs and on monolithic mullite. The FGM specimens had better thermal shock resistance than did monolithic mullite. The thermal shock resistance of FGMs was influenced by the sintering-induced residual thermal stress. Cracks caused by thermal shock were observed, and the mechanism of crack formation was discussed.
Keywords :
Functionally graded material , Thermal shock property , Powder metallurgy processing , Mullite/Mo composites
Journal title :
Materials Chemistry and Physics
Journal title :
Materials Chemistry and Physics