Effect of Relative Density on a Compressive Deformation Rate in Chromium Carbide Composite (Cr<SUB>3</SUB>C<SUB>2</SUB>+Cr<SUB>7</SUB>C<SUB>3</SUB>) and the Reliability in the Strength
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The effect of relative density on a compressive deformation rate in chromium carbide composite (Cr<SUB>3</SUB>C<SUB>2</SUB>+Cr<SUB>7</SUB>C<SUB>3</SUB>) and the reliability in the strength was investigated. A chromium carbide sintered compact with a carbon content of 13.1wt% was fabricated from the high purity Cr<SUB>3</SUB>C<SUB>2</SUB> powder with a particle size below 1μm. After being presintered at 1673-1773 K for 3000 sunder a vacuum of 0.13 Pa, the green compact was pressed isostatically at 150 MPa at 1623K for 3600s. The deformation rate in the composite with a lower relative density increases under a high compressive strength at an elevated temperature. But that with a higher relative density above 98% is hardly influenced by a stress. A HIP process is significantly effective in increasing in the density of the composite. The composite with a Weible parameter of 16.8 can be produced with a deflection of±15% in 2S/σ<SUB>m</SUB> by the HIP.
- 社団法人 粉体粉末冶金協会の論文