Hu Shao-Chung2,Chang Kuen-Liang1,Sung James C.1,2,3,Tso Pei-Lum4,Hsu Kai-Hung1,Sung Michael5
(1.National Taipei University of Technology, Taipei 106, Taiwan)
(2.KINIK Company, 64, Chung-San Rd., Ying-Kuo, Taipei Hsien 239, Taiwan)
(3.National Taiwan University, Taipei 106, Taiwan)
(4.PME Dept. National Tsing Hua University, Hsinchu 300, Taiwan)
(5.Advanced Diamond Solutions, Inc., 351 King Street Suite 813, San Francisco, CA 94158, U.S.A.)
Abstract Polycrystalline grits (polygrits) have been used widely in industry as abrasives. Due to their higher impact strength and the friable nature, polygrits are more endurable and more efficient than monocrystal grits (monogrits) in material removal applications. For example, polygrits of alumina may last longer and cut faster than monogrits. Similarly, polygrits of cubic boron nitride is a superior superabrasive than monogrits of the same.
Although diamond superabrasives have been indispensable for constructional sawing applications and industrial grinding applications, there has no polygrits of diamond that are commercially available. In this research, we used a novel technology to sinter micron diamond fines to form polygrits of diamond. The characterization demonstrated that polygrits of diamond can be tough to withstand impact. But due to the presence of micro grains, the grit can sharpen itself without dulling by shedding the worn grains. This paper revealed many examples of using diamond polygrits.