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美国佐治亚州Woodstock城的现代工程材料 (Advanced Engineered Materials-AEM)实验中心最近将推出一种新的TiB_2(二硼化钛)陶瓷刀具材料,商品名为Advanced TiB_2。这种材料的显微硬度达3400,可用于铣削和车削黑色和有色金属、淬硬钢和高温合金等材料,寿命比现有的硬质合金刀具长5～6倍,而成本只高出2～3倍。普通的TiB_2陶瓷材料问世已有很长时间了,但这次推出的TiB_2材料是用佐治亚州理工学院开发的“自扩散高温合成工艺(Self-propagating high-tem-perature synthesis process—SHS)制成的。用这种工艺可合成高纯度的TiB_2并可与其相近的元素生成复合陶瓷,例如TiB_2Al_2O_3。AEM的专家指出,SHS是化学过程,能合成小于亚微米的粉末,比通常的合成方法的粒
The Advanced Engineered Materials-AEM Laboratory in Woodstock, Georgia, USA, recently introduced a new TiB2 (titanium diboride) ceramic tool material under the tradename Advanced TiB2. This material has a microhardness of 3400. It can be used for milling and turning of black and non-ferrous metals, hardened steels and superalloys. It lasts 5 to 6 times longer than existing carbide tools and costs only 2 ~ 3 times. TiB 2 ceramic materials have been available for a long time. However, the TiB 2 material introduced by this time is made by the self-propagating high-tem-perature synthesis process (SHS) developed by the Georgia Institute of Technology .This process can be synthesized using high purity TiB_2 and similar elements can produce composite ceramics, such as TiB_2Al_2O_3.AEM experts pointed out that SHS is a chemical process can synthesize less than submicron powder, than the usual synthesis method of particles