紀要論文

遠心力スラリー・放電プラズマ焼結法によるAl_2O_3/ZrO_2/SUS304系傾斜機能材料の作製と評価

FABRICATION OF ALUMINA/ ZIRCONIA/ 304 STAINLESS STEEL FUNCTIONALLY GRADED MATERIALS USING CENTRIFUGAL SLURRY METHOD AND SPARK PLASMA SINTERING

jpn

24368083

https://doi.org/10.15002/00030627

法政大学大学院理工学研究科

法政大学大学院紀要. 理工学研究科編

65

1

8

2024-03-24

Version of Record

Ceramic/ metal functionally graded materials (FGMs) have been promising to sustain coating structures working under super high temperature as well as high temperature gradient conditions. Compositional gradients in the FGMs can be engineered according to functional performance requirements. This study aims to fabricate Al_2O_3/ZrO_2/SUS304 hybrid FGMs with continuous compositional gradient manners using a combination of centrifugal slurry methods and spark plasma sintering (SPS). The compositional gradients in the FGMs were investigated on microstructures with elemental distributions and hardness on the cross sections of the FGMs. It was demonstrated that the compositions of ZrO_2 and SUS304 continuously varied in the FGMs, while Al_2O_3 resided only on ZrO_2 -rich sides, which can effectively enhance the fracture toughness of the ZrO_2 -rich layer. Ball milling treatments can make the Al_2O_3 layer more formed in the ZrO2 -rich layer. With increasing the amount of Al_2O_3, the Al_2O_3 layer resided closer to the top of the ZrO_2 surfaces in the FGMs subject to ball milling treatments, which can prevent the crack propagation from the ZrO_2 top surface.

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