Xu H.-L.,Huanghe Whirlwind Co. |
Xu H.-L.,Zhengzhou University |
Wang Y.-C.,Huanghe Whirlwind Co. |
Wan X.-D.,Huanghe Whirlwind Co. |
And 2 more authors.
Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering | Year: 2012
Polycrystalline cubic boron nitride (PcBN) compacts were obtained by sintering cubic boron nitride (cBN) powder and Al powder under 5.0 GPa, 1300~1400 °C, with Al content (volume fraction) being 5%, 10%, 15%, 20%, respectively. X-ray diffraction and scanning electron microscopy were carried out to investigate the phase composition and microstructure of the PcBN compacts. The abrasion ratio and the impact resistance of the compacts are investigated also. It is revealed that the main phases of PcBN compacts are cBN and AlN. With the increase of the Al content in the starting materials, the AlN content increases correspondingly and the performances of the PcBN compacts change also. When 10% Al (volume fraction) is added, the obtained PcBN compact achieves the optimum properties, with the abrasion ratio being 21 842 and the impact resistance over 100 counts.