108 顆粒表面へのバインダー偏析が及ぼすアルミナ成形体の強度への影響(セラミックス/セラミックス基複合材料(2),ものづくりにおける基礎研究と先端技術の融合)

概要

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The effect of binder segregation in alumina granules on strength of green compacts was investigated. The thickness of sgregated binder layer affected the strength of the green compact as well as the granule itself. The addtive concentration of 5.0wt% polyacrylic acid type binder to alumina granules served segregated binder layer on the surface of granules. This layer disappeared when the binder concentration was less than 2.5wt%. The fracture strength of a granule with 5.0wt% PAA binder was much lower than that of green compacts made from the granules. In the case of 2.5wt% PAA binder concentration, on the other hand, the fracture strength of a granule was higher than that of the green compacts. This result was consistent with that of the fracture surface in which differenct fracture mechanisms was observed between the green compacts with 2.5wt% and 5.0wt% of PAA binder.
一般社団法人日本機械学会の論文
2010-11-27