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    • 2. 发明授权
    • Titanium diboride/boron carbide composites with high hardness and
toughness
    • 二硼化钛/碳化硼复合材料具有高硬度和韧性
    • US4957884A
    • 1990-09-18
    • US181852
    • 1988-04-15
    • Arne K. KnudsenWilliam Rafaniello
    • Arne K. KnudsenWilliam Rafaniello
    • B01J19/12C01B31/36C01B35/04C04B35/563C04B35/58
    • C04B35/645B01J19/121C01B31/36C01B35/04C04B35/563C04B35/58071B01J2219/0894C01P2002/72C01P2004/02C01P2004/03C01P2004/04C01P2004/61C01P2004/62C01P2006/10C01P2006/90
    • A powder composition consisting essentially of an intimate mixture of boron carbide and titanium diboride, the mixture having an average particle size of less than about 0.5 micron, the particles being uniformaly dispersed such that elemental analytical techniques show all discrete concentrations of boron carbide and titanium diboride to be less than or equal to about 0.5 micron in diameter, is disclosed. The powder is useful for making a densified ceramic composition comprising titanium diboride grains, having an average grain size of less than or equal to about 3 microns in diameter, uniformly dispersed with boron carbide grains, having an average grain size of less than about 5 microns in diameter. The densified composition exhibits improved hardness and toughness when compared with titanium diboride or boron carbide compositions. The powder can be prepared by a process comprising subjecting a stream of reactant gases consisting essentially of a volatile boron source, a volatile titanium source, a volatile carbon source, and a hydrogen source to an amount of laser radiation and at a pressure effective to convert as least a portion of the volatile boron, carbon and titanium sources to an intimate mixture of boron carbide and titanium diboride.
    • 基本上由碳化硼和二硼化钛的紧密混合物组成的粉末组合物,该混合物具有小于约0.5微米的平均粒度,所述颗粒是均匀分散的,使得元素分析技术显示出所有离散浓度的碳化硼和二硼化钛 为直径小于或等于约0.5微米。 该粉末可用于制造包含平均粒径小于或等于约3微米直径的二硼化钛颗粒的致密化陶瓷组合物,其平均颗粒尺寸小于约5微米,均匀分散于碳化硼颗粒中 直径。 与二硼化钛或碳化硼组合物相比,致密组合物显示出改进的硬度和韧性。 粉末可以通过以下方法制备,该方法包括使基本上由挥发性硼源,挥发性钛源,挥发性碳源和氢源组成的反应物气流经受一定量的激光辐射并且在有效转化的压力 挥发性硼,碳和钛的至少一部分源自碳化硼和二硼化钛的紧密混合物。
    • 7. 发明授权
    • Titanium diboride/boron carbide composites with high hardness and
toughness
    • 二硼化钛/碳化硼复合材料具有高硬度和韧性
    • US5032242A
    • 1991-07-16
    • US468497
    • 1990-01-22
    • Arne K. KnudsenWilliam Rafaniello
    • Arne K. KnudsenWilliam Rafaniello
    • B01J19/12C01B31/36C01B35/04C04B35/563C04B35/58
    • C04B35/645B01J19/121C01B31/36C01B35/04C04B35/563C04B35/58071B01J2219/0894C01P2002/72C01P2004/02C01P2004/03C01P2004/04C01P2004/61C01P2004/62C01P2006/10C01P2006/90
    • A powder composition consisting essentially of an intimate mixture of boron carbide and titanium diboride, the mixture having an average particle size of less than about 0.5 micron, the particles being uniformly dispersed such that elemental analytical techniques show all discrete concentrations of boron carbide and titanium diboride to be less than or equal to about 0.5 micron in diameter, is disclosed. The powder is useful for making a densified ceramic composition comprising titanium diboride grains, having an average grain size of less than or equal to about 3 microns in diameter, uniformly dispersed with boron carbide grains, having an average grain size of less than about 5 microns in diameter. The densified composition exhibits improved hardness and toughness when compared wiht titanium diboride or boron carbide compositions. The powder can be prepared by a process comprising subjecting a stream of reactant gases consisting essentially of a volatile boron source, a volatile titanium source, a volatile carbon source, and a hydrogen source to an amount of laser radiation and at a pressure effective to convert at least a portion of the volatile boron, carbon and titanium sources to an intimate mixture of boron carbide and titanium diboride.
    • 基本上由碳化硼和二硼化钛的紧密混合物组成的粉末组合物,该混合物具有小于约0.5微米的平均粒度,所述颗粒均匀分散,使得元素分析技术显示出所有离散浓度的碳化硼和二硼化钛 为直径小于或等于约0.5微米。 该粉末可用于制造包含平均粒径小于或等于约3微米直径的二硼化钛颗粒的致密化陶瓷组合物,其平均颗粒尺寸小于约5微米,均匀分散于碳化硼颗粒中 直径。 当与二硼化钛或碳化硼组合物相比时,致密组合物显示出改进的硬度和韧性。 粉末可以通过以下方法制备,该方法包括使基本上由挥发性硼源,挥发性钛源,挥发性碳源和氢源组成的反应物气流经受一定量的激光辐射并且在有效转化的压力 挥发性硼,碳和钛的至少一部分源于碳化硼和二硼化钛的紧密混合物。