Al2O3-cBN functionally graded material (FGM) was synthesized by spark plasma sintering (SPS) using powder compact with graded compositions containing 0 to 20 vol% cBN under a uniaxial pressure of 100 MPa. Densification, phase transformation of cBN, microstructure, hardness and fracture toughness of the FGM were investigated. Al2O3-cBN FGM with relative density of more than 99% was prepared at 1300 °C for 600s. No obvious interface between Al2O3 and cBN layers was observed, and cBN particles were uniformly dispersed in an Al 2O3 matrix. Vickers hardness and fracture toughness continuously increased with cBN content, and reached to 28 GPa and 5 MPa · m1/2 respectively at the surface layer.
|ジャーナル||Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy|
|出版ステータス||Published - 2008 5月|
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