Effect of Ball Milling Treatment on Compositional Gradients in Functionally Graded Materials Fabricated by Centrifugal Slurry Methods

Yuto Imai; Yusei Takemoto; Hideaki Tsukamoto

doi:10.4028/p-2uxp08

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HomeMaterials Science ForumMaterials Science Forum Vol. 1083Effect of Ball Milling Treatment on Compositional...

Effect of Ball Milling Treatment on Compositional Gradients in Functionally Graded Materials Fabricated by Centrifugal Slurry Methods

Abstract:

Ceramic-metal functionally graded materials (FGMs) are advantageous to two dissimilar materials joined directly together, which includes smoothing of thermal stress distributions, minimization or elimination of stress concentrations and singularities at the interface corners and increase in bonding strength. In this study, ZrO₂/ 304 stainless steel (SUS304) FGMs with continuous gradient manners, not stepwise manners, were fabricated by a combination of centrifugal slurry methods and spark plasma sintering (SPS). The size and surface smoothness of the powders of SUS304 highly affected formation of compositional gradient patterns in the FGMs. Effects of ball milling time and ball sizes on such conditions of the powders as well as compositional gradients in the FGMs were investigated by microstructure observations with element analysis and hardness probing on the cross sections of the FGMs.