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公开(公告)号：US4762558A
公开(公告)日：1988-08-09
申请号：US50914
申请日：1987-05-15
申请人： Randall M. German , Animesh Bose , David Sims
发明人： Randall M. German , Animesh Bose , David Sims
CPC分类号： C22C1/0433 , B22F3/23
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US06540800B2
公开(公告)日：2003-04-01
申请号：US09732834
申请日：2000-12-07
申请人： Andrew J. Sherman , Animesh Bose
发明人： Andrew J. Sherman , Animesh Bose
IPC分类号： C09K314
CPC分类号： C09K3/1445
摘要： An abrasive composite particle comprising a cubic abrasive core particle encapsulated within a deposit of hexagonal metallurgical bond forming material comprising at least about 50 volume percent rhenium, ruthenium, osmium or mixtures thereof. The metallurgical bonds serve to retain the core particle in a matrix/binder very strongly. Metallurgical bonds are formed by the encapsulating material taking into solution, at the interface with the cubic abrasive core particle, some element or compound from the abrasive particle such as, for example, carbon or cubic boron nitride, from the core particle. Chemical bonds are not formed between the abrasive particle and the deposit. Suitable abrasive core particles include diamond, cubic carbides, cubic borides, cubic nitrides, cubic oxides, and the like. Conventional fabrication procedures such as chemical vapor deposition are employed to form the metallurgical bond forming deposit on the core particle. The composite abrasive particles are useful in forming articles according to conventional powdered metal processing operations. The articles so formed are useful for their hardness as well as their abrasiveness.
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公开(公告)号：US08100318B1
公开(公告)日：2012-01-24
申请号：US12703815
申请日：2010-02-11
IPC分类号： B23K20/00
CPC分类号： B23K20/22 , B23K20/028
摘要： A process of making useful shapes by joining of tungsten alloys. Joining of tungsten heavy alloys which are alloys typically made from W—Ni—Fe is used. These alloys are typically manufactured by liquid phase sintering. This leads to difficulty in producing large length to diameter ratio parts that have some significant weight (such as penetrators). A “brick and mortar” approach is employed wherein smaller segments of this alloy (low length to diameter ratio) are joined to together to produce a larger part with higher length to diameter ratio.
摘要翻译： 通过钨合金连接制作有用形状的工艺。 使用通常由W-Ni-Fe制成的合金的钨重合金的连接。 这些合金通常通过液相烧结制造。 这导致难以生产具有一些显着重量的大直径比部件（例如穿透器）。 采用“砖和砂浆”方法，其中该合金的较小部分（低长径比）被连接在一起以产生具有较高长径比的较大部分。
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公开(公告)号：US06641918B1
公开(公告)日：2003-11-04
申请号：US09583061
申请日：2000-05-30
申请人： Andrew J. Sherman , Animesh Bose
发明人： Andrew J. Sherman , Animesh Bose
IPC分类号： B32B516
CPC分类号： C04B41/009 , B22F1/025 , C04B41/4584 , C04B41/52 , C04B41/81 , C04B41/89 , C22C29/08 , Y10T428/2991 , Y10T428/2993 , Y10T428/2998 , C04B41/4531 , C04B41/5057 , C04B41/5061 , C04B41/5031 , C04B41/5068 , C04B41/522 , C04B41/5144 , C04B35/56
摘要： Geldhart class C tungsten carbide particles are provided with a discontinuous coating of grain growth inhibitor. Further, the fine tungsten carbide coatings are preferably provided with a continuous coating of another discreet phase material, such as, for example, a continuous coating of cobalt. Compacts produced using such materials are particularly useful as WC—Co hardmetals wherein the compacts are extremely fine grained.
摘要翻译： 格尔达哈特C级碳化钨颗粒具有不连续的晶粒生长抑制剂涂层。 此外，细碳化钨涂层优选设置有另一个分散相材料的连续涂层，例如钴的连续涂层。 使用这种材料生产的压块特别适用于WC-Co硬质合金，其中压块是非常细粒度的。
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公开(公告)号：US20080120889A1
公开(公告)日：2008-05-29
申请号：US11480639
申请日：2006-07-03
申请人： Animesh Bose , Robert J. Dowding , Jeffrey J. Swab
发明人： Animesh Bose , Robert J. Dowding , Jeffrey J. Swab
CPC分类号： F41A21/20 , B22F3/225 , B22F5/085 , B22F2998/00 , B22F2998/10 , F41A21/18 , C22C29/08 , B22F3/1025 , B22F2202/03 , B22F3/15 , B22F3/10 , B22F3/1035
摘要： Gun barrels made from advanced materials have the potential to provide a significant increase in barrel life as well as a reduction in weight (for advanced ceramic materials) for small caliber systems. The potential use of advanced materials as gun barrels is severely limited due to the difficulty in introducing the rifling pattern on the inner diameter. Most projectiles coming out of the guns are spin stabilized (for aerodynamic flight stability). This spin is imparted by a rifling pattern (lands and grooves) in the inner surface of the gun barrel. The processing of gun barrels made from advanced materials with internal rifling pattern poses a tremendous processing challenge to the materials community. The rifling lands and grooves and desired twist rate coupled with the difficulty of machining some of the advanced materials (ceramics, cermets, hardmetals, etc.) makes the economic manufacturing of such gun barrels extremely difficult. Currently, this form of rifling is achieved by machining in case of metallic gun barrels.The limitation in producing the rifled pattern lies with the conventional processing of complex shaped advanced materials such as ceramics, cermets, or hardmetals. Shaping of these typically requires careful diamond grinding. This grinding process is not only very expensive but it also introduces flaws in case of the brittle ceramics (microcracks). These flaws are detrimental to the performance of these advanced materials as rifled gun barrels. Thus, there is an opportunity and challenge to the materials community to come up with a processing solution that will allow advanced materials such as silicon nitride (Si3N4), SiAlON, hardmetals, etc. to be used as gun barrels that have the rifled pattern in the inner diameter.Herein are provided methods and compositions useful to form the rifled gun barrel tubes from advanced materials using little or no machining of the internal rifled geometry.
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公开(公告)号：US5863492A
公开(公告)日：1999-01-26
申请号：US874360
申请日：1997-06-13
申请人： Animesh Bose
发明人： Animesh Bose
摘要： A high density, high strength and high compressive strain tungsten heavy alloy consists essentially of tungsten in the amount of approximately 90% by weight, and the rest Mn and Ni in an amount sufficient to cause sintering at between 1100.degree. and 1400.degree. C. The W-Ni-Mn alloy exhibits characteristics of intense shear bands (which could indicate failure by adiabatic shear during high strain-rate dynamic testing) thus making it an attractive material for kinetic energy penetrators. Moreover, the alloy provides an inexpensive high density material which can be produced in furnaces for conventional ferrous powder metal part manufacturing and other conventional non-ferrous powder metal part manufacturing by lowering the sintering temperature by 2000.degree. to 300.degree. C.
摘要翻译： 高密度，高强度和高压缩应变钨重合金基本上由大约90重量％的钨组成，其余的Mn和Ni的量足以在1100和1400℃之间引起烧结。 W-Ni-Mn合金具有强剪切带的特征（可能表明在高应变速率动态测试中绝热剪切失效），因此使其成为动能穿透器的有吸引力的材料。 此外，该合金提供廉价的高密度材料，其可以通过将烧结温度降低2000℃至300℃，在用于常规铁基金属部件制造的炉中和其它常规有色金属零件制造中制造。
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公开(公告)号：US5603073A
公开(公告)日：1997-02-11
申请号：US938821
申请日：1992-09-01
申请人： Animesh Bose
发明人： Animesh Bose
摘要： A high density, high strength and high compressive strain tungsten heavy alloy consists essentially of tungsten in the amount of approximately 90% by weight, and the rest Mn and Ni in an amount sufficient to cause sintering at between 1100.degree. and 1400.degree. C. The W--Ni--Mn alloy exhibits characteristics of intense shear bands (which could indicate failure by adiabatic shear during high strain-rate dynamic testing) thus making it an attractive material for kinetic energy penetrators. Moreover, the alloy provides an inexpensive high density material which can be produced in furnaces for conventional ferrous powder metal part manufacturing and other conventional non-ferrous powder metal part manufacturing by lowering the sintering temperature by 200.degree. to 300.degree. C.
摘要翻译： 高密度，高强度和高压缩应变钨重合金基本上由大约90重量％的钨组成，其余的Mn和Ni的量足以在1100和1400℃之间引起烧结。 W-Ni-Mn合金具有强剪切带的特征（可能表明在高应变速率动态测试中绝热剪切失效），因此使其成为动能穿透器的有吸引力的材料。 此外，该合金提供了廉价的高密度材料，其可以通过将烧结温度降低200℃至300℃而在常规铁粉零件制造的炉中和其它常规的有色金属零件制造中生产。
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公开(公告)号：US5240782A
公开(公告)日：1993-08-31
申请号：US867765
申请日：1992-04-13
申请人： Animesh Bose , James Lankford , Richard Page , Cheryl Blanchard
发明人： Animesh Bose , James Lankford , Richard Page , Cheryl Blanchard
CPC分类号： C22C47/068 , B22F7/04 , C04B35/80 , C22C47/20 , B22F2999/00 , Y10T428/12035 , Y10T428/12049
摘要： A composite material (20) comprises a matrix layer (21) having a plurality of interspersed reinforcing whiskers (23) and a plurality of continuous reinforcing fibers (25) embedded within the matrix layer (21). The preferred embodiment includes a matrix layer (21) which may be a ceramic, intermetallic or metallic material having interspersed reinforcing whiskers (23) upon which a second layer of the matrix (24) having embedded continuous reinforcing fibers (25) is placed, and a third layer (22) of the matrix material having the interspersed reinforcing whiskers (23) on the second layer (24). The composite exhibits improved fracture toughness due to the crack deflection ability of whiskers (23) and crack bridging and fiber pull out due to continuous fibers (25) and minimizes creep associated with known ceramic and intermetallic composites.
摘要翻译： 复合材料（20）包括具有多个散布的增强晶须（23）的基质层（21）和嵌入在基体层（21）内的多个连续增强纤维（25）。 优选实施例包括可以是具有散置的增强晶须（23）的陶瓷，金属间或金属材料的基体层（21），其上放置具有嵌入的连续增强纤维（25）的基体（24）的第二层，以及 所述基质材料的第三层（22）在所述第二层（24）上具有散布的增强晶须（23）。 由于晶须（23）的裂纹偏转能力和由于连续纤维（25）引起的裂纹桥接和纤维拉出，复合材料表现出改善的断裂韧性，并且最小化与已知的陶瓷和金属间复合材料相关的蠕变。
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公开(公告)号：US5166004A
公开(公告)日：1992-11-24
申请号：US726981
申请日：1991-07-08
申请人： Animesh Bose , James Lankford , Richard Page , Cheryl Blanchard
发明人： Animesh Bose , James Lankford , Richard Page , Cheryl Blanchard
CPC分类号： C22C47/068 , B22F7/04 , C04B35/80 , C22C47/14 , C22C47/20 , B22F2999/00 , Y10T428/12035 , Y10T428/12049 , Y10T428/12056 , Y10T428/12174 , Y10T428/12486 , Y10T428/249929 , Y10T428/249945 , Y10T428/31678
摘要： A composite material (20) comprises a matrix layer (21) having a plurality of interspersed reinforcing whiskers (23) and a plurality of continuous reinforcing fibers (25) embedded within the matrix layer (21). The preferred embodiment includes a matrix layer (21) which may be a ceramic, intermetallic or metallic material having interspersed reinforcing whiskers (23) upon which a second layer of the matrix (24) having embedded continuous reinforcing fibers (25) is placed, and a third layer (22) of the matrix material having the interspersed reinforcing whiskers (23) on the second layer (24). The composite exhibits improved fracture toughness due to the crack deflection ability of whiskers (23) and crack bridging and fiber pull out due to continuous fibers (25) and minimizes creep associated with known ceramic and intermetallic composites.
摘要翻译： 复合材料（20）包括具有多个散布的增强晶须（23）的基质层（21）和嵌入在基体层（21）内的多个连续增强纤维（25）。 优选实施方案包括基质层（21），其可以是陶瓷，金属间或金属材料，其具有分散的增强晶须（23），其上放置具有嵌入的连续增强纤维（25）的基质（24）的第二层，以及 所述基质材料的第三层（22）在所述第二层（24）上具有散布的增强晶须（23）。 由于晶须（23）的裂纹偏转能力和由于连续纤维（25）引起的裂纹桥接和纤维拉出，复合材料表现出改善的断裂韧性，并且最小化与已知的陶瓷和金属间复合材料相关的蠕变。
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公开(公告)号：US4851042A
公开(公告)日：1989-07-25
申请号：US220515
申请日：1988-07-18
申请人： Animesh Bose , Randall M. German
发明人： Animesh Bose , Randall M. German
摘要： A tungsten heavy alloy system is modified by replacing from 2% to 10% of the tungsten by weight with tantalum to increase the strength and hardness characteristics for the alloy. This renders the alloy particularly useful for kinetic energy penetrators.
摘要翻译： 通过用钽替代钨重量的2％至10％来改变钨重合金体系，以增加合金的强度和硬度特性。 这使得该合金对于动能穿透器特别有用。
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