| 发明名称 |
HIGH HARDNESS B4C ORIENTED BY FERROMAGNETIC FIELD TECHNIQUE AND METHOD FOR MANUFACTURING THE SAME |
| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an ultrahard polycrystalline boron carbide material and a method for manufacturing the same. <P>SOLUTION: This polycrystalline B<SB POS="POST">4</SB>C material can be manufactured by a ferromagnetic field alignment technique and sintering. The c-axes of the B<SB POS="POST">4</SB>C are highly oriented perpendicularly to an applied magnetic field. Hardnesses measured on surfaces perpendicular/parallel to the c-axes are 38.86±2.13 GPa and 31.31±0.79 GPa, respectively. Application areas of the B<SB POS="POST">4</SB>C material are extended by these large values of hardnesses and large values of modulus of elasticity and fracture toughness. <P>COPYRIGHT: (C)2012,JPO&INPIT |
| 申请公布号 |
JP2012062210(A) |
申请公布日期 |
2012.03.29 |
| 申请号 |
JP20100206450 |
申请日期 |
2010.09.15 |
| 申请人 |
NATIONAL INSTITUTE FOR MATERIALS SCIENCE |
发明人 |
GRASSO SALVATORE;HU CHUNFENG;OLEG VASYLKIV;SUZUKI TATSU;SAKKA YOSHIO |
| 分类号 |
C04B35/563;C01B31/30;C04B35/64 |
主分类号 |
C04B35/563 |
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