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    • 4. 发明授权
    • Process for making finely divided intermetallic
    • 精细分散金属间化合物的工艺
    • US5330701A
    • 1994-07-19
    • US843605
    • 1992-02-28
    • Karl G. ShawDavid E. AlmanRene M. CooperRandall M. GermanKazuo P. McCoy
    • Karl G. ShawDavid E. AlmanRene M. CooperRandall M. GermanKazuo P. McCoy
    • B22F3/22C22C1/04B22F9/00
    • B22F3/23C22C1/0491C22C26/00C22C32/0084B22F2003/248B22F2998/00B22F2998/10
    • A method is disclosed for controlling a self-propagating reaction in a particulate medium. The method comprises controlling the boundary heat flux of the reaction to produce reaction waves which travel through the particulate medium undergoing a self-propagating reaction. The method provides a product having a unitary, solid structure with layers of alternating density. Preferably the reaction is a reaction between two metals to produce an intermetallic compound or between a metal and a non-metal to produce a ceramic compound. Nickel aluminide is a preferred intermetallic compound. Also disclosed is a controlled reactive sintering process for producing a finely divided intermetallic compound comprising comminuting the layered body of intermetallic compound. Also disclosed are a process for preparing an abrasive surface composed of a nickel aluminide binder and an abrasive material, an injection molding composition for preparing shaped articles of nickel aluminide, and a process for injection molding shaped nickel aluminide articles of greater than 98% theoretical density.
    • 公开了一种用于控制颗粒介质中的自蔓延反应的方法。 该方法包括控制反应的边界热通量以产生穿过经历自蔓延反应的颗粒介质的反应波。 该方法提供了具有交替密度层的单一,固体结构的产品。 优选地,反应是两种金属之间的反应以产生金属间化合物或金属与非金属之间的反应以产生陶瓷化合物。 镍铝化合物是优选的金属间化合物。 还公开了一种用于生产精细分散的金属间化合物的受控反应烧结方法,其包括粉碎金属间化合物的层状体。 还公开了一种制备由镍铝化合物粘合剂和研磨材料组成的研磨表面的方法,用于制备镍铝化合物的成型制品的注射成型组合物,以及注射成型的成型镍铝制品的方法,其具有大于理论密度的98% 。
    • 6. 发明授权
    • Thermomechanical processing of plasma sprayed intermetallic sheets
    • 等离子喷涂金属间板的热机械加工
    • US06332936B1
    • 2001-12-25
    • US09399364
    • 1999-09-20
    • Mohammad R. HajaligolClive ScoreyVinod K. SikkaSeetharama C. DeeviGrier FleischhauerA. Clifton Lilly, Jr.Randall M. German
    • Mohammad R. HajaligolClive ScoreyVinod K. SikkaSeetharama C. DeeviGrier FleischhauerA. Clifton Lilly, Jr.Randall M. German
    • B22F500
    • C22C33/0278B22F3/18B22F5/006B22F9/082B22F2003/248B22F2009/0824B22F2009/088B22F2998/10C21D8/0205C21D8/0236C21D8/0273C22C1/0491B22F3/115B22F3/16B22F3/24
    • A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as ≦1% Cr, ≧0.05% Zr ≦2% Ti, ≦2% Mo, ≦1% Ni, ≦0.75% C, ≦0.1% B, ≦1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, and/or ≦3% Cu. The process includes forming a non-densified metal sheet by consolidating a powder having an intermetallic alloy composition such as by roll compaction, tape casting or plasma spraying, forming a cold rolled sheet by cold rolling the non-densified metal sheet so as to increase the density and reduce the thickness thereof and annealing the cold rolled sheet. The powder can be a water, polymer or gas atomized powder which is subjecting to sieving and/or blending with a binder prior to the consolidation step. After the consolidation step, the sheet can be partially sintered. The cold rolling and/or annealing steps can be repeated to achieve the desired sheet thickness and properties. The annealing can be carried out in a vacuum furnace with a vacuum or inert atmosphere. During final annealing, the cold rolled sheet recrystallizes to an average grain size of about 10 to 30 &mgr;m. Final stress relief annealing can be carried out in the B2 phase temperature range.
    • 从具有金属间合金组成如粉末铁,镍或钛铝化物的粉末制备片材的粉末冶金方法。 可以将片材制造成具有改善的室温延展性,电阻率,耐循环疲劳性,耐高温氧化性,低和高温强度和/或耐高温下垂的电阻加热元件。 铁铝化物具有完全不含奥氏体的铁素体组织,并且可以以重量%计含有4至32%的Al和任选的添加物,例如<= 1%Cr,> = 0.05%Zr <= 2%Ti, = 2%Mo,<= 1%Ni,≤= 0.75%C,<= 0.1%B,≤1%亚微米级氧化物颗粒和/或电绝缘或导电共价陶瓷颗粒,≤1%稀土金属, 和/或<= 3%Cu。 该方法包括通过将具有金属间化合物组合物的粉末如通过辊压,带铸或等离子体喷涂固结形成非致密金属片,通过冷轧非致密金属片形成冷轧板,以增加 密度并减小其厚度并退火冷轧板。 粉末可以是在固结步骤之前与粘合剂进行筛分和/或共混的水,聚合物或气体雾化粉末。 在固结步骤之后,片材可以部分烧结。 可以重复冷轧和/或退火步骤以实现所需的板厚度和性能。 退火可以在真空或惰性气氛的真空炉中进行。 在最终退火期间,冷轧板再结晶至平均粒径约为10〜30μm。 最终的应力消除退火可以在B2相温度范围内进行。
    • 7. 发明授权
    • Polymer quenched prealloyed metal powder
    • 聚合物淬火预合金金属粉末
    • US06293987B1
    • 2001-09-25
    • US09455516
    • 1999-12-07
    • Mohammad R. HajaligolGrier FleischhauerRandall M. German
    • Mohammad R. HajaligolGrier FleischhauerRandall M. German
    • B22F910
    • C22C33/0278B22F3/18B22F5/006B22F9/082B22F2003/248B22F2009/0824B22F2009/088B22F2998/10C21D8/0205C21D8/0236C21D8/0273C22C1/0491B22F3/115B22F3/16B22F3/24
    • A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as ≦1% Cr, ≧0.05% Zr ≦2% Ti, ≦2% Mo, ≦1% Ni, ≦0.75% C, ≦0.1% B, ≦1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, and/or ≦3 % Cu. The process includes forming a non-densified metal sheet by consolidating a powder having an intermetallic alloy composition such as by roll compaction, tape casting or plasma spraying, forming a cold rolled sheet by cold rolling the non-densified metal sheet so as to increase the density and reduce the thickness thereof and annealing the cold rolled sheet. The powder can be a water, polymer or gas atomized powder which is subjecting to sieving and/or blending with a binder prior to the consolidation step. After the consolidation step, the sheet can be partially sintered. The cold rolling and/or annealing steps can be repeated to achieve the desired sheet thickness and properties. The annealing can be carried out in a vacuum furnace with a vacuum or inert atmosphere. During final annealing, the cold rolled sheet recrystallizes to an average grain size of about 10 to 30 &mgr;m. Final stress relief annealing can be carried out in the B2 phase temperature range.
    • 从具有金属间合金组成如粉末铁,镍或钛铝化物的粉末制备片材的粉末冶金方法。 可以将片材制造成具有改善的室温延展性,电阻率,耐循环疲劳性,耐高温氧化性,低和高温强度和/或耐高温下垂的电阻加热元件。 铁铝化物具有完全不含奥氏体的铁素体组织,并且可以以重量%计含有4至32%的Al和任选的添加物,例如<= 1%Cr,> = 0.05%Zr <= 2%Ti, = 2%Mo,<= 1%Ni,≤= 0.75%C,<= 0.1%B,≤1%亚微米级氧化物颗粒和/或电绝缘或导电共价陶瓷颗粒,≤1%稀土金属, 和/或<= 3%Cu。 该方法包括通过将具有金属间化合物组合物的粉末如通过辊压,带铸或等离子体喷涂固结形成非致密金属片,通过冷轧非致密金属片形成冷轧板,以增加 密度并减小其厚度并退火冷轧板。 粉末可以是在固结步骤之前与粘合剂进行筛分和/或共混的水,聚合物或气体雾化粉末。 在固结步骤之后,片材可以部分烧结。 可以重复冷轧和/或退火步骤以实现所需的板厚度和性能。 退火可以在真空或惰性气氛的真空炉中进行。 在最终退火期间,冷轧板再结晶至平均粒径约为10〜30μm。 最终的应力消除退火可以在B2相温度范围内进行。
    • 9. 发明授权
    • Production of reactive sintered nickel aluminide material
    • 反应性烧结镍铝化合物的生产
    • US4762558A
    • 1988-08-09
    • US50914
    • 1987-05-15
    • Randall M. GermanAnimesh BoseDavid Sims
    • Randall M. GermanAnimesh BoseDavid Sims
    • B22F3/23C22C1/04B22F3/00
    • C22C1/0433B22F3/23
    • Reactive sintering process for producing a shaped body containing the nickel aluminide compound Ni.sub.3 Al, which comprises sintering a compacted shaped mass containing an intimate mixture of substances, e.g. including elemental nickel powder and elemental aluminum powder in a stoichiometric atomic ratio generally corresponding to the compound Ni.sub.3 Al, by heating the mass, e.g. in a vacuum, to an elevated sintering temperature, e.g. 500-750.degree. C., sufficiently to initiate an exothermic reaction, and at a heating rate sufficiently for consequent progressive generation of a transient liquid below the melting point of the aluminum powder and at the corresponding eutectic temperature, and upon initiation of the exothermic reaction continuing the sintering sufficiently to form a densified shaped body containing the nickel aluminide compound Ni.sub.3 Al, and having a porosity of at most about 8%, or alternatively having an essentially fully densified structure where the heating is carried out under simultaneously applied mechanical pressure for hot isostatic compaction of the compacted shaped mass.
    • 用于生产含有镍铝化合物Ni3Al的成形体的反应性烧结方法,其包括烧结含有物质的紧密混合物的压实成形物质,例如, 包括通常对应于化合物Ni3Al的化学计量原子比的元素镍粉和元素铝粉,通过加热该质量,例如 在真空中,升高的烧结温度,例如 500-750℃,足以引发放热反应,并以足够的加热速率逐渐产生低于铝粉熔点并在相应共晶温度下的瞬时液体,并且在引发放热反应 继续充分烧结以形成包含镍铝化合物Ni3Al的致密成形体,并且具有至多约8%的孔隙率,或者具有基本上完全致密化的结构,其中在同时施加的机械压力下进行热等静压 压实成型块的压实。
    • 10. 发明授权
    • Method of manufacturing aluminide sheet by thermomechanical processing of aluminide powders
    • 通过铝化物粉末的热机械加工制造铝化物片的方法
    • US06660109B2
    • 2003-12-09
    • US09984871
    • 2001-10-31
    • Mohammad R. HajaligolClive ScoreyVinod K. SikkaSeetharama C. DeeviGrier FleishhauerA. Clifton Lilly, Jr.Randall M. German
    • Mohammad R. HajaligolClive ScoreyVinod K. SikkaSeetharama C. DeeviGrier FleishhauerA. Clifton Lilly, Jr.Randall M. German
    • C21D800
    • C22C33/0278B22F3/18B22F5/006B22F9/082B22F2003/248B22F2009/0824B22F2009/088B22F2998/10C21D8/0205C21D8/0236C21D8/0273C22C1/0491B22F3/115B22F3/16B22F3/24
    • A powder metallurgical process of preparing a sheet from a powder having an intermetallic alloy composition such as an iron, nickel or titanium aluminide. The sheet can be manufactured into electrical resistance heating elements having improved room temperature ductility, electrical resistivity, cyclic fatigue resistance, high temperature oxidation resistance, low and high temperature strength, and/or resistance to high temperature sagging. The iron aluminide has an entirely ferritic microstructure which is free of austenite and can include, in weight %, 4 to 32% Al, and optional additions such as ≦1% Cr, ≧0.05% Zr ≦2% Ti, ≦2% Mo, ≦1% Ni, ≦0.75% C, ≦0.1% B, ≦1% submicron oxide particles and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, and/or ≦3% Cu. The process includes forming a non-densified metal sheet by consolidating a powder having an intermetallic alloy composition such as by roll compaction, tape casting or plasma spraying, forming a cold rolled sheet by cold rolling the non-densified metal sheet so as to increase the density and reduce the thickness thereof and annealing the cold rolled sheet. The powder can be a water, polymer or gas atomized powder which is subjecting to sieving and/or blending with a binder prior to the consolidation step. After the consolidation step, the sheet can be partially sintered. The cold rolling and/or annealing steps can be repeated to achieve the desired sheet thickness and properties. The annealing can be carried out in a vacuum furnace with a vacuum or inert atmosphere. During final annealing, the cold rolled sheet recrystallizes to an average grain size of about 10 to 30 &mgr;m. Final stress relief annealing can be carried out in the B2 phase temperature range.
    • 从具有金属间合金组成如粉末铁,镍或钛铝化物的粉末制备片材的粉末冶金方法。 可以将片材制造成具有改善的室温延展性,电阻率,耐循环疲劳性,耐高温氧化性,低和高温强度和/或耐高温下垂的电阻加热元件。 铁铝化物具有完全不含奥氏体的铁素体组织,并且可以以重量%计含有4至32%的Al和任选的添加物,例如<= 1%Cr,> = 0.05%Zr <= 2%Ti, = 2%Mo,<= 1%Ni,≤= 0.75%C,<= 0.1%B,≤1%亚微米级氧化物颗粒和/或电绝缘或导电共价陶瓷颗粒,≤1%稀土金属, 和/或<= 3%Cu。 该方法包括通过将具有金属间化合物组合物的粉末如通过辊压,带铸或等离子体喷涂固结形成非致密金属片,通过冷轧非致密金属片形成冷轧板,以增加 密度并减小其厚度并退火冷轧板。 粉末可以是在固结步骤之前与粘合剂进行筛分和/或共混的水,聚合物或气体雾化粉末。 在固结步骤之后,片材可以部分烧结。 可以重复冷轧和/或退火步骤以实现所需的板厚度和性能。 退火可以在真空或惰性气氛的真空炉中进行。 在最终退火期间,冷轧板再结晶至平均粒径约为10〜30μm。 最终的应力消除退火可以在B2相温度范围内进行。