Saw Diamonds Grown with Patterned Seeding in Cubic Presses
Saw diamonds (20-60 mesh) are indispensable for cutting stone and concrete.Hence,their consumptions are correlated with constructional activities.The decades long construction of buildings and highways in China has made the country the largest (in quantities) user and maker of saw diamonds in the world since 1995.Saw diamonds were typically made by high pressure belt apparatuses (e.g., GE, DB, ID) with a costly die that is easily breakable under hoop tension due to the stretching of the compressed cell.Chinese”s cubic presses are equipped with six anvils with no die, and they managed to make more diamond than anvils consumed.Moreover, there are dozens of companies that are competing fiercefully.Consequently, the cost of making diamond in China has been greatly reduced.The conventional saw diamond manufacture employed cells that contained alternative layers of graphite and catalyst (e.g., Invar metal or Fe2Ni).This layout limits the interface for nucleation of diamond.At the turn of this century, following the lead of Winter”s process, Chinese began to use the mixture of graphite and catalyst to grow saw diamonds.As a consequence, the diamond crystals grown became tighter in size, and stronger in toughness.In 2003, the author developed patterned seeding for growing saw diamonds in powdered cells for cubic presses.The tests at Zhongnan Diamond (now world”s largest saw diamond maker) and Huanghe Whirlwind (now world”s second largest saw diamond maker) demonstrated that the diamond sizes were even more uniform, and diamond shapes, much better controlled.
saw diamond cubic press diamond seeding boron doped diamond
James C.Sung
President of Right Diamond Company, and Licensor of Kinik Company
国内会议
第六届郑州国际超硬材料及制品研讨会暨庆祝中国人造金刚石诞生50周年大会
郑州
英文
89-112
2013-11-13（万方平台首次上网日期，不代表论文的发表时间）