Fabrication and Mechanical Properties of Bionic Shell Ceramic Tool Material
The bionic shell ceramic tool material with good mechanical properties is prepared with Al2O3-(W,Ti)C as matrix layer,and Al2O3-TiC as inter layer material by hot press sintering.The stack structure parameters such as layer number,layer thickness ratio and interface shape are optimized.The mechanical properties of the material are tested and its microstructure is analyzed.The result shows that the material has better comprehensive mechanical properties when the number of layers and the thickness ratio are 3.After introducing different interface shapes between layers,the mechanical properties of tool materials are improved compared with those without interface shapes.For the prepared samples,the opti-mum fracture toughness,Vickers hardness and flexural strength are 7.16MPa·m1/2±0.04MPa·m1/2,20.40GPa±0.07GPa and 981.72MPa±10.86MPa,respectively.
the bionic shell ceramic tool materialstack structure parametermechanical propertymicrostructure
万方数据
维普
