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    • 7. 发明授权
    • Catalytic bipolar interconnection plate for use in a fuel cell
    • 用于燃料电池的催化双极互连板
    • US5496655A
    • 1996-03-05
    • US322660
    • 1994-10-12
    • Paul A. Lessing
    • Paul A. Lessing
    • H01M8/02H01M8/06H01M8/12H01M8/24
    • H01M8/0243H01M8/0208H01M8/0217H01M8/0228H01M8/0236H01M8/0625H01M8/2425H01M2008/1293H01M2300/0074H01M4/9025H01M4/9041H01M4/905H01M4/9066Y02P70/56
    • A bipolar interconnection plate for use between adjacent fuel cell units in a stacked fuel cell assembly. Each plate is manufactured from an intermetallic composition, examples of which include NiAl or Ni.sub.3 Al which can catalyze steam reforming of hydrocarbons. Distributed within the intermetallic structure of the plate is a ceramic filler composition. The plate includes a first side with gas flow channels therein and a second side with fuel flow channels therein. A protective coating is applied to the first side, with exemplary coatings including strontium-doped or calcium-doped lanthanum chromite. To produce the plate, Ni and Al powders are combined with the filler composition, compressed at a pressure of about 10,000-30,000 psi, and heated to about 600.degree.-1000.degree. C. The coating is then applied to the first side of the completed plate using liquid injection plasma deposition or other deposition techniques.
    • 一种用于堆叠的燃料电池组件中的相邻燃料电池单元之间的双极互连板。 每个板由金属间组合物制成,其实例包括可催化烃的蒸汽重整的NiAl或Ni3Al。 在板的金属间结构内分布有陶瓷填料组合物。 板包括其中具有气体流动通道的第一侧和其中具有燃料流动通道的第二侧。 在第一面施加保护性涂层,其中包括掺杂锶掺杂或钙掺杂的亚铬酸镧的示例性涂层。 为了生产该板,将Ni和Al粉末与填充剂组合物组合,在约10,000-30,000psi的压力下压缩,并加热到约600-1000℃。然后将涂层施加到完成的第一面 使用液体注入等离子体沉积或其他沉积技术。
    • 9. 发明授权
    • Radiation shielding composition
    • 辐射屏蔽组成
    • US6166390A
    • 2000-12-26
    • US123979
    • 1998-07-28
    • William J. QuappPaul A. Lessing
    • William J. QuappPaul A. Lessing
    • G21F1/04G21F1/06G21F1/08G21F1/10G21F3/00G21F5/005
    • G21F1/042G21F1/047G21F1/06G21F1/085G21F1/106G21F3/00G21F5/005G21Y2002/301G21Y2002/601G21Y2004/101G21Y2004/60
    • A composition for use as a radiation shield. The shield is a concrete product containing a stable uranium aggregate for attenuating gamma rays and a neutron absorbing component, the uranium aggregate and neutron absorbing component being present in the concrete product in sufficient amounts to provide a concrete having a density between about 4 and about 15 grams/cm.sup.3 and which will at a predetermined thickness, attenuate gamma rays and absorb neutrons from a radioactive material of projected gamma ray and neutron emissions over a determined time period. The composition is preferably in the form of a container for storing radioactive materials that emit gamma rays and neutrons. The concrete container preferably comprises a metal liner and/or a metal outer shell. The resulting radiation shielding container has the potential of being structurally sound, stable over a long period of time, and, if desired, readily mobile.
    • 用作辐射屏蔽的组合物。 盾牌是含有稳定的铀骨料以减少γ射线和中子吸收组分的混凝土产品,铀骨料和中子吸收组分以足够的量存在于混凝土产品中,以提供密度在约4至约15之间的混凝土 克/厘米3,并且其将处于预定厚度,在确定的时间段内衰减伽马射线并从放射性材料中投射γ射线和中子发射的中子。 组合物优选为用于储存放射γ射线和中子的放射性材料的容器的形式。 混凝土容器优选地包括金属衬垫和/或金属外壳。 所得到的辐射屏蔽容器具有结构良好,长时间稳定的潜力,并且如果需要,容易移动。
    • 10. 发明授权
    • Method for manufacturing whisker preforms and composites
    • 制造晶须预制件和复合材料的方法
    • US5464583A
    • 1995-11-07
    • US100008
    • 1993-07-29
    • Paul A. Lessing
    • Paul A. Lessing
    • C04B35/80C30B25/00C04B35/81
    • C22C1/1036C04B35/80C22C47/12C22C49/12C30B25/005C30B29/38
    • A process for manufacturing Si.sub.3 N.sub.4 /SiAlON whiskers by mixing silicon carbide powder with aluminum nitride powder, adding impurities such as calcium oxide or potassium chloride to control whisker characteristics, forming the mixture in a boron nitrogen mold of desired shaped and hot isostatically pressing the formed mixture in a nitrogen environment to produce whiskers comprised substantially of SiAlON at the nucleating end of the whisker and Si.sub.3 N.sub.4 at the other end of the whisker. In one embodiment, reinforced composites are formed by impregnating the Si.sub.3 N.sub.4 /SiAlON whisker preform with a matrix material such as resin binders, liquid metals, intermetallics or ceramic materials.
    • 通过将碳化硅粉末与氮化铝粉末混合,添加诸如氧化钙或氯化钾的杂质来控制晶须特性来制造Si 3 N 4 / SiAlON晶须的方法,在硼氮模具中形成所需的形状和热等静压压制形成的混合物 在氮气环境下,在晶须的成核端产生基本上由SiAlON构成的晶须,在晶须的另一端产生Si 3 N 4。 在一个实施方案中,通过用诸如树脂粘合剂,液态金属,金属间化合物或陶瓷材料的基质材料浸渍Si 3 N 4 / SiAlON晶须预型体来形成增强复合材料。