公开(公告)号：US06200515B1

公开(公告)日：2001-03-13

申请号：US09374049

申请日：1999-08-13

申请人： Zuhair A. Munir ,  Frederic Charlot ,  Frederic Bernard ,  Eric Gaffet

发明人： Zuhair A. Munir ,  Frederic Charlot ,  Frederic Bernard ,  Eric Gaffet

IPC分类号： B22F314

CPC分类号： C04B35/58092 ,  B22F1/0018 ,  B22F3/23 ,  B22F2999/00 ,  B82Y30/00 ,  C04B35/645 ,  H05B3/0004 ,  B22F3/14 ,  B22F3/105 ,  B22F9/04

摘要： Solid reaction products with a dense nanocrystalline structure are formed from reactant particles with diameters in the nano-scale range by compacting the particles into a green body, then passing an electric current through the body causing Joule heating sufficient to initiate the reaction to form the reaction product while simultaneously applying pressure to the reacting body to density it to a density approaching the theoretical density of the pure product. Surprisingly, this process results in a reaction product that retains the nanocrystalline structure of the starting materials, despite the fact that a reaction has occurred and the materials have been subjected to highly stringent conditions of electric current, heat and pressure.

摘要翻译： 具有致密纳米晶体结构的固体反应产物由直径在纳米级范围的反应物颗粒形成，通过将颗粒压实成生坯，然后使电流通过体，引起焦耳加热足以引发反应以形成反应 产物，同时向反应体施加压力以使其密度接近纯产品的理论密度。 令人惊奇的是，尽管发生了反应并且材料已经受到高度严格的电流，热和压力条件的影响，但是该方法产生保留起始材料的纳米晶体结构的反应产物。