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25 条记录 (耗时 0.023 秒)

    Method for controlling the oxygen content in agglomerated molybdenum powders
    1.
    发明授权
    Method for controlling the oxygen content in agglomerated molybdenum powders 失效
    控制团聚钼粉中氧含量的方法

    公开(公告)号：US4624700A

    公开(公告)日：1986-11-25

    申请号：US831201

    申请日：1986-02-20

    申请人： David J. Port ,  David L. Houck ,  Frank D. Kinney

    发明人： David J. Port ,  David L. Houck ,  Frank D. Kinney

    IPC分类号： B22F1/02 ,  B22F3/00 ,  C22C1/04 ,  C23C4/06 ,  B22F9/00

    CPC分类号： C22C1/045 ,  B22F1/025 ,  B22F3/001 ,  C23C4/06

    摘要： A method is disclosed for introducing a controlled level of oxygen into agglomerated molybdenum plasma spray powder. The method involves forming a relatively uniform mixture of agglomerated powders consisting essentially of molybdenum and one or more oxygen containing compounds of molybdenum wherein said mixture has an oxygen content of greater than about 10% by weight and reducing the mixture at a sufficient temperature for a sufficient time to remove a portion of the oxygen therefrom and form a molybdenum powder having an oxygen content of no greater than about about 10% by weight.

    摘要翻译： 公开了一种将控制水平的氧引入聚集的钼等离子体喷涂粉末中的方法。 该方法包括形成基本上由钼和一种或多种含氧化合物钼组成的附聚粉末的相对均匀的混合物，其中所述混合物的氧含量大于约10重量％，并将该混合物在足够的温度下还原足够的 时间以从其中除去一部分氧气并形成氧含量不大于约10重量％的钼粉末。

    Process for producing composite agglomerates of molybdenum and molybdenum carbide
    2.
    发明授权
    Process for producing composite agglomerates of molybdenum and molybdenum carbide 失效
    用于生产钼和碳化钼复合附聚物的方法

    公开(公告)号：US4716019A

    公开(公告)日：1987-12-29

    申请号：US58213

    申请日：1987-06-04

    申请人： David L. Houck ,  David J. Port ,  Jen S. Lee

    发明人： David L. Houck ,  David J. Port ,  Jen S. Lee

    IPC分类号： B22F1/00 ,  C22C1/05 ,  C22C29/06

    CPC分类号： C22C1/055 ,  B22F1/0096 ,  C22C29/06

    摘要： A process is disclosed for producing composite agglomerates of molybdenum and molybdenum carbide (Mo.sub.2 C). The process involves forming a relatively uniform mixture of non-agglomerated molybdenum powder and carbon powder having a particle size of no greater than the particle size of the molybdenum powder. The amount of carbon powder is proportional to the amount of molybdenum carbide desired in the composite agglomerate. A slurry is formed of the mixture, an organic binder, and water with the amount of the binder being no greater than about 2% by weight of the mixture; and the powders are agglomerated from the slurry. The agglomerated powders are then classified to remove the major portion of the agglomerates having a size greater than about 170 mesh and less than about 325 mesh from the balance of the agglomerates. The balance of the agglomerates in which the particle size is -170 +325 mesh is then reacted at a temperature of no greater than about 1400.degree. C. for a sufficient time in a non-carbonaceous vessel in a reducing atmosphere to form the composite agglomerates.

    摘要翻译： 公开了用于生产钼和钼碳化物（Mo 2 C）的复合附聚物的方法。 该方法包括形成粒径不大于钼粉末的粒径的非团聚的钼粉末和碳粉末的相对均匀的混合物。 碳粉的量与复合附聚物中所需的碳化钼的量成比例。 混合物形成浆料，有机粘合剂和水，粘合剂的量不大于混合物重量的约2％; 粉末从浆料中凝聚。 然后对附聚的粉末进行分级以从附聚物的余量除去具有大于约170目且小于约325目的尺寸的附聚物的主要部分。 然后将粒径为-170±325目的附聚物的余量在不大于约1400℃的温度下在还原气氛中的非碳质容器中反应足够的时间，以形成复合结块体 。

    Ammonium dodecamolybdomolybdate and method of making
    4.
    发明授权
    Ammonium dodecamolybdomolybdate and method of making 失效
    十二钼多钼酸铵及其制备方法

    公开(公告)号：US06793907B1

    公开(公告)日：2004-09-21

    申请号：US10207503

    申请日：2002-07-29

    申请人： Raj P. Singh ,  Thomas A. Wolfe ,  David L. Houck

    发明人： Raj P. Singh ,  Thomas A. Wolfe ,  David L. Houck

    IPC分类号： C01G3902

    CPC分类号： C01G39/00 ,  C01P2002/72 ,  C01P2002/74 ,  C01P2002/86

    摘要： A novel molybdenum compound, ammonium dodecamolybdomolybdate (AMM), is described which may be used in the manufacture of molybdenum metal and molybdenum carbide powders. The molybdenum compound is a dodecaheteropoly acid salt having a Keggin-type structure wherein molybdenum resides in both the hetero as well as peripheral atomic positions. The novel compound has the general formula (NH4)2Mo12MoO40.6H2O. Because of its low solubility, the compound can be crystallized efficiently and at a high purity from ammonium molybdate solutions.

    摘要翻译： 描述了一种新的钼化合物，十二烷基多钼酸铵（AMM），其可用于制造钼金属和碳化钼粉末。 钼化合物是具有Keggin型结构的十二杂多酸盐，其中钼位于杂原子和外周原子位置。 该新化合物具有通式（NH 4）2 Mo 12 MoO 40·6H 2 O。 由于溶解度低，化合物可以有效地从钼酸铵溶液中高纯度地结晶出来。

    Method for controlling the oxygen content in agglomerated molybdenum powders
    5.
    发明授权
    Method for controlling the oxygen content in agglomerated molybdenum powders 失效
    控制团聚钼粉中氧含量的方法

    公开(公告)号：US5173108A

    公开(公告)日：1992-12-22

    申请号：US790120

    申请日：1991-11-12

    申请人： David L. Houck

    发明人： David L. Houck

    IPC分类号： C22B34/34

    CPC分类号： C22B34/34

    摘要： A method is disclosed for producing an agglomerated molybdenum plasma spray powder with a controlled level of oxygen which comprises forming a relatively uniform mixture of agglomerated powders containing molybdenum dioxide and one or more ammonium-containing compounds of molybdenum wherein the mixture has an oxygen content of greater than about 25% by weight and reducing the mixture in a moving bed furnace at a temperature of from about 700.degree. C. to about 1000.degree. C. for a sufficient time to remove a portion of the oxygen therefrom and form reduced molybdenum powder agglomerates having an oxygen content of no greater than about 25% by weight. The reduction takes place in the direction from the outside surface of the agglometates to the inside surface.

    摘要翻译： 公开了一种用于生产具有受控的氧含量的聚集的钼等离子喷涂粉末的方法，其包括形成包含二氧化钼和一种或多种含钼化合物的钼的附聚粉末的相对均匀的混合物，其中所述混合物的氧含量更大 约25重量％，并且在移动床炉中将混合物在约700℃至约1000℃的温度下还原足够的时间以从其中除去一部分氧，并形成还原的钼粉附聚物，其具有 氧含量不大于约25重量％。 还原发生在从聚集体的外表面到内表面的方向上。

    Method for preparing powders of nickel alloy and molybdenum for thermal spray coatings
    6.
    发明授权
    Method for preparing powders of nickel alloy and molybdenum for thermal spray coatings 失效
    用于制备镍合金粉末和用于热喷涂的莫尔氏体的方法

    公开(公告)号：US5063021A

    公开(公告)日：1991-11-05

    申请号：US527456

    申请日：1990-05-23

    申请人： Vidhu Anand ,  Sanjay Sampath ,  Clarke D. Davis ,  David L. Houck

    发明人： Vidhu Anand ,  Sanjay Sampath ,  Clarke D. Davis ,  David L. Houck

    IPC分类号： C23C4/02 ,  C23C4/06

    CPC分类号： C23C4/067

    摘要： A method is disclosed for preparing an intimate mixture of powders of nickel-boron-silicon alloy and molybdenum metal powder suitable for thermal spray coatings which comprises milling a starting mixture of the alloy and molybdenum powder to produce a milled mixture wherein the average particle size is less than about 10 micrometers in diameter, forming an aqueous slurry of the resulting milled mixture and a binder which can be an ammoniacal molybdate compound or polyvinyl alcohol, and agglomerating the milled mixture and binder. The intimate mixture and binder are preferably sintered in a reducing atmosphere at a temperature of about 800.degree. C. to about 950.degree. C. for a sufficient time to form a sintered partially alloyed mixture wherein the bulk density is greater than about 1.2 g/cc. The resulting sintered mixture is preferably entrained in an inert carrier gas, passed into a plasma flame wherein the plasma gas can be argon or a mixture of argon and hydrogen, and maintained in the plasma flame for a sufficient time to melt essentially all of the powder particles of the sintered mixture to form spherical particles of the melted portion, and to further alloy the sintered mixture, and cooled.

    Method of making powder for thermal spray application
    10.
    发明授权
    Method of making powder for thermal spray application 失效
    粉末喷涂方法

    公开(公告)号：US5126104A

    公开(公告)日：1992-06-30

    申请号：US710851

    申请日：1991-06-06

    申请人： Vidhu Anand ,  Sanjay Sampath ,  David L. Houck ,  Jack E. Vanderpool

    发明人： Vidhu Anand ,  Sanjay Sampath ,  David L. Houck ,  Jack E. Vanderpool

    IPC分类号： B22F1/00 ,  C22C32/00 ,  C23C4/06

    CPC分类号： C22C32/0047 ,  B22F1/0096 ,  C23C4/06 ,  B22F2999/00

    摘要： A method is disclosed for preparing an intimate mixture of powders of nickel-chromium-boron-silicon alloy, molybdenum metal powder, and Cr.sub.3 C.sub.2 /NiCr alloy suitable for thermal spray coatings which comprises milling a starting mixture of the above two alloys with molybdenum powder to produce a milled mixture wherein the average particle size is less than about 10 micrometers in diameter, forming an aqueous slurry of the resulting milled mixture and a binder which can be an ammoniacal molybdate compound or polyvinyl alcohol, and agglomerating the milled mixture and binder. The intimate mixture and binder may be sintered in a reducing atmosphere at a temperature of about 800.degree. C. to 950.degree. C. for a sufficient time to form a sintered partially alloyed mixture wherein the bulk density is greater than about 1.2 g/cc. The resulting sintered mixture may be entrained in an inert carrier gas, passed into a plasma flame wherein the plasma gas can be argon or a mixture of argon and hydrogen, and maintained in the plasma flame for a sufficient time to melt essentially all of the powder particles of the sintered mixture to form spherical particles of the melted portion, and to further alloy the sintered mixture, and cooled.

    摘要翻译： 公开了一种制备适用于热喷涂的镍 - 铬 - 硼 - 硅合金，钼金属粉末和Cr3C2 / NiCr合金粉末的紧密混合物的方法，该方法包括将上述两种合金的起始混合物与钼粉末 产生直径小于约10微米的平均粒度的研磨混合物，形成所得研磨混合物的水性浆液和可以是氨基钼酸盐化合物或聚乙烯醇的粘合剂，并使研磨的混合物和粘合剂附聚。 紧密混合物和粘合剂可以在还原气氛中在约800℃至950℃的温度下烧结足够的时间以形成烧结的部分合金化混合物，其中堆积密度大于约1.2g / cc。 所得到的烧结混合物可以夹带在惰性载气中，通入等离子体火焰中，其中等离子体气体可以是氩气或氩气和氢气的混合物，并保持在等离子体火焰中足够的时间以熔化基本上所有的粉末 烧结混合物的颗粒形成熔融部分的球形颗粒，并进一步合并烧结的混合物并冷却。