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    Oxidation, carburization and/or sulfidation resistant iron aluminide alloy
    12.
    发明授权
    Oxidation, carburization and/or sulfidation resistant iron aluminide alloy 有权
    氧化，渗碳和/或耐硫化铁铝合金

    公开(公告)号：US06607576B1

    公开(公告)日：2003-08-19

    申请号：US09172375

    申请日：1998-10-14

    申请人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    发明人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    IPC分类号： C22C3302

    CPC分类号： C22C33/0278 ,  B22F3/23 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/0491 ,  C22C38/06 ,  B22F3/04 ,  B22F3/20 ,  B22F3/1208 ,  B22F3/18 ,  B22F3/10 ,  B22F9/082 ,  B22F3/15 ,  B22F2201/05

    摘要： The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have 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 alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, ≦1% Cr and either ≧0.05% Zr or Zro2 stringers extending perpendicular to an exposed surface of the heating element or ≧0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, ≦2% Ti, ≦2% Mo, ≦1% Zr, ≦1% C, ≦0.1% B. ≦30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, ≦1% oxygen, ≦3% Cu, balance Fe.

    摘要翻译： 本发明一般涉及可用作电阻加热元件的含铝铁基合金。 含铝铁基合金具有改善的室温延展性，电阻率，循环耐疲劳性，耐高温氧化性，低，高温强度和/或耐高温下垂的能力。 该合金具有完全不含奥氏体的铁素体组织，其重量％包括超过4％的Al，≤1％的Cr和> = 0.05％的Zr或Zro2桁条，垂直于加热元件的暴露表面延伸，或 > = 0.1％氧化物分散质颗粒。 该合金可以含有14-32％的Al，<= 2％Ti，<= 2％Mo，≤1％Zr，≤1％C，<= 0.1％B. <= 30％氧化物分散质和/或电 绝缘或导电共价陶瓷颗粒，<= 1％稀土金属，<= 1％氧，<= 3％Cu，余量为Fe。

    Thermomechanical processing of plasma sprayed intermetallic sheets
    13.
    发明授权
    Thermomechanical processing of plasma sprayed intermetallic sheets 有权
    等离子喷涂金属间板的热机械加工

    公开(公告)号：US06332936B1

    公开(公告)日：2001-12-25

    申请号：US09399364

    申请日：1999-09-20

    申请人： Mohammad R. Hajaligol ,  Clive Scorey ,  Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier Fleischhauer ,  A. Clifton Lilly, Jr. ,  Randall M. German

    发明人： Mohammad R. Hajaligol ,  Clive Scorey ,  Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier Fleischhauer ,  A. Clifton Lilly, Jr. ,  Randall M. German

    IPC分类号： B22F500

    CPC分类号： C22C33/0278 ,  B22F3/18 ,  B22F5/006 ,  B22F9/082 ,  B22F2003/248 ,  B22F2009/0824 ,  B22F2009/088 ,  B22F2998/10 ,  C21D8/0205 ,  C21D8/0236 ,  C21D8/0273 ,  C22C1/0491 ,  B22F3/115 ,  B22F3/16 ,  B22F3/24

    摘要： 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.

    摘要翻译： 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。

    Iron aluminide useful as electrical resistance heating elements
    14.
    发明授权
    Iron aluminide useful as electrical resistance heating elements 有权
    具有氧化物分散体的铁铝化物片的加工

    公开(公告)号：US06280682B1

    公开(公告)日：2001-08-28

    申请号：US09399355

    申请日：1999-09-20

    申请人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    发明人： Vinod K. Sikka ,  Seetharama C. Deevi ,  Grier S. Fleischhauer ,  Mohammad R. Hajaligol ,  A. Clifton Lilly, Jr.

    IPC分类号： B22F102

    CPC分类号： C22C33/0278 ,  B22F3/23 ,  B22F2998/00 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/0491 ,  B22F3/04 ,  B22F9/082 ,  B22F3/1208 ,  B22F3/20 ,  B22F3/15 ,  B22F3/18 ,  B22F3/10 ,  B22F2201/05

    摘要： The invention relates generally to aluminum containing iron-base alloys useful as electrical resistance heating elements. The aluminum containing iron-base alloys have 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 alloy has an entirely ferritic microstructure which is free of austenite and includes, in weight %, over 4% Al, ≦1% Cr and either ≧0.05% Zr or ZrO2 stringers extending perpendicular to an exposed surface of the heating element or ≧0.1% oxide dispersoid particles. The alloy can contain 14-32% Al, ≦2% Ti, ≦2% Mo, ≦1% Zr, ≦1% C, ≦0.1% B, ≦30% oxide dispersoid and/or electrically insulating or electrically conductive covalent ceramic particles, ≦1% rare earth metal, ≦1% oxygen, ≦3% Cu, balance Fe.

    摘要翻译： 本发明一般涉及可用作电阻加热元件的含铝铁基合金。 含铝铁基合金具有改善的室温延展性，电阻率，循环耐疲劳性，耐高温氧化性，低，高温强度和/或耐高温下垂的能力。 该合金具有完全不含奥氏体的铁素体组织，其重量％包括超过4％的Al，≤1％的Cr和> = 0.05％的Zr或ZrO2桁条，其垂直于加热元件的暴露表面延伸，或 > = 0.1％氧化物分散质颗粒。 该合金可以含有14-32％的Al，<= 2％Ti，<= 2％Mo，≤1％Zr，≤1％C，<= 0.1％B，<= 30％氧化物分散质和/或电 绝缘或导电共价陶瓷颗粒，<= 1％稀土金属，<= 1％氧，<= 3％Cu，余量为Fe。

    Electrically powered ceramic composite heater
    19.
    发明授权
    Electrically powered ceramic composite heater 失效
    电动陶瓷复合加热器

    公开(公告)号：US5498855A

    公开(公告)日：1996-03-12

    申请号：US291690

    申请日：1994-08-16

    申请人： Seetharama C. Deevi ,  A. Clifton Lilly, Jr.

    发明人： Seetharama C. Deevi ,  A. Clifton Lilly, Jr.

    IPC分类号： A24F47/00 ,  H05B3/10 ,  A24F1/22

    CPC分类号： A24F47/008

    摘要： An electrically powered ceramic composite heater useful for devices such as a cigarette lighter. The electrical resistance heater includes a discrete heating segment configuration wherein each individual segment of the heater can be activated using an electric control module, and is capable of heating to a temperature in the range of 600.degree. C. to 900.degree. C. using portable energy devices. The ceramic heater can be made by extrusion of a ceramic precursor material followed by secondary processing steps to obtain discrete heating segments. The heater design is such that a hub on one end of the heater provides structural integrity, and functions as a common for the electrical terminals. The ceramic heater can include one or more insulating or semiconductive metal compounds and one or more electrically conductive metal compounds, the compounds being present in amounts which provide a resistance which does not change by more than 20% throughout a heating cycle between ambient temperatures and 900.degree. C.

    摘要翻译： 一种用于诸如点烟器等设备的电动陶瓷复合加热器。 电阻加热器包括分立的加热段配置，其中加热器的每个单独段可以使用电控制模块启动，并且能够使用便携式能量加热至600℃至900℃的温度 设备。 陶瓷加热器可以通过陶瓷前体材料的挤出制成，然后进行二次加工步骤以获得分立的加热段。 加热器设计使得加热器一端上的轮毂提供结构完整性，并且用作电气端子的共同点。 陶瓷加热器可以包括一种或多种绝缘或半导体金属化合物和一种或多种导电金属化合物，该化合物以提供在环境温度和900之间的加热循环中不改变超过20％的电阻的量存在 DEG C.

    Method for making a carbonaceous heat source containing metal oxide
    20.
    发明授权
    Method for making a carbonaceous heat source containing metal oxide 失效
    制造含有金属氧化物的碳质热源的方法

    公开(公告)号：US5468266A

    公开(公告)日：1995-11-21

    申请号：US71313

    申请日：1993-06-02

    申请人： Azzedine Bensalem ,  Sarojini Deevi ,  Seetharama C. Deevi ,  Donald M. Schleich

    发明人： Azzedine Bensalem ,  Sarojini Deevi ,  Seetharama C. Deevi ,  Donald M. Schleich

    IPC分类号： A24B15/28 ,  A24B15/16 ,  A24D1/00 ,  A24F47/00 ,  C10L9/00 ,  C10L9/10 ,  C10L10/00 ,  C10L11/00

    CPC分类号： A24B15/165 ,  Y02E50/30

    摘要： A carbonaceous heat source comprising metal oxides and methods for making such heat source are provided. The heat source has an ignition temperature substantially lower than conventional carbonaceous heat sources, while at the same time produces virtually no carbon monoxide upon combustion. The heat source is prepared by pre-forming the carbon and binder materials into a desired shape, and then treating the shape with a sol containing metal oxide precursors. The metal oxide precursors are deposited in the pre-formed carbon shape. Further treatment converts the deposited metal oxide precursors into metal oxide.

    摘要翻译： 提供了包含金属氧化物的碳质热源和制造这种热源的方法。 该热源具有明显低于常规含碳热源的点火温度，同时在燃烧时几乎不产生一氧化碳。 通过将碳和粘合剂材料预成型为期望的形状，然后用含有金属氧化物前体的溶胶处理该形状来制备热源。 金属氧化物前体以预形成的碳形状沉积。 进一步处理将沉积的金属氧化物前体转化为金属氧化物。