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    Process for the preparation of fiber-reinforced ceramic composites by chemical vapor deposition
    2.
    发明授权
    Process for the preparation of fiber-reinforced ceramic composites by chemical vapor deposition 失效
    通过化学气相沉积制备纤维增强陶瓷复合材料的方法

    公开(公告)号：US4580524A

    公开(公告)日：1986-04-08

    申请号：US648398

    申请日：1984-09-07

    申请人： Walter J. Lackey, Jr. ,  Anthony J. Caputo

    发明人： Walter J. Lackey, Jr. ,  Anthony J. Caputo

    IPC分类号： C04B35/80 ,  C23C16/04 ,  C23C16/44 ,  C23C16/46

    CPC分类号： C04B30/02 ,  C04B35/80 ,  C04B35/806 ,  C23C16/045 ,  C23C16/44

    摘要： A chemical vapor deposition (CVD) process for preparing fiber-reinforced ceramic composites. A specially designed apparatus provides a steep thermal gradient across the thickness of a fibrous preform. A flow of gaseous ceramic matrix material is directed into the fibrous preform at the cold surface. The deposition of the matrix occurs progressively from the hot surface of the fibrous preform toward the cold surface. Such deposition prevents the surface of the fibrous preform from becoming plugged. As a result thereof, the flow of reactant matrix gases into the uninfiltrated (undeposited) portion of the fibrous preform occurs throughout the deposition process. The progressive and continuous deposition of ceramic matrix within the fibrous preform provides for a significant reduction in process time over known chemical vapor deposition processes.

    摘要翻译： 用于制备纤维增强陶瓷复合材料的化学气相沉积（CVD）工艺。 特别设计的设备在纤维预制件的厚度上提供了陡峭的热梯度。 气态陶瓷基体材料的流动被引导到冷表面的纤维预制件中。 基体的沉积从纤维预制件的热表面向冷表面逐渐发生。 这种沉积防止了纤维预型体的表面堵塞。 作为其结果，在整个沉积过程中，反应基质气体流入纤维预制件的未渗透（未沉积）部分的流动。 在纤维预制件内逐渐和连续地沉积陶瓷基体提供了比已知化学气相沉积工艺大大降低了工艺时间。

    Process to minimize cracking of pyrolytic carbon coatings
    4.
    发明授权
    Process to minimize cracking of pyrolytic carbon coatings 失效
    使热解碳涂层开裂最小化的工艺

    公开(公告)号：US4068015A

    公开(公告)日：1978-01-10

    申请号：US738939

    申请日：1976-11-04

    申请人： Walter J. Lackey, Jr. ,  John D. Sease

    发明人： Walter J. Lackey, Jr. ,  John D. Sease

    IPC分类号： G21C3/62 ,  G21C3/06

    CPC分类号： G21C3/626 ,  Y02E30/38

    摘要： Carbon-coated microspheroids useful as fuels in nuclear reactors are produced with a low percentage of cracked coatings and are imparted increased strength and mechanical stability characteristics by annealing immediately after the carbon coating processes.

    摘要翻译： 在核反应堆中用作燃料的碳涂层微球体以低百分比的裂化涂料生产，并且通过在碳涂覆工艺之后立即退火赋予增强的强度和机械稳定性特征。

    Dispersion toughened ceramic composites and method for making same
    7.
    发明授权
    Dispersion toughened ceramic composites and method for making same 失效
    分散强化陶瓷复合材料及其制备方法

    公开(公告)号：US4598024A

    公开(公告)日：1986-07-01

    申请号：US655488

    申请日：1984-09-28

    申请人： David P. Stinton ,  Walter J. Lackey ,  Robert J. Lauf

    发明人： David P. Stinton ,  Walter J. Lackey ,  Robert J. Lauf

    IPC分类号： C04B41/50 ,  C04B41/87 ,  C23C16/30 ,  B32B9/04

    CPC分类号： C04B41/009 ,  C04B41/5071 ,  C04B41/87 ,  C23C16/30

    摘要： Ceramic composites exhibiting increased fracture toughness are produced by the simultaneous codeposition of silicon carbide and titanium disilicide by chemical vapor deposition. A mixture of hydrogen, methyltrichlorosilane and titanium tetrachloride is introduced into a furnace containing a substrate such as graphite or silicon carbide. The thermal decomposition of the methyltrichlorosilane provides a silicon carbide matrix phase and the decomposition of the titanium tetrachloride provides a uniformly dispersed second phase of the intermetallic titanium disilicide within the matrix phase. The fracture toughness of the ceramic composite is in the range of about 6.5 to 7.0 MPa.sqroot.m which represents a significant increase over that of silicon carbide.

    摘要翻译： 显示出增加的断裂韧性的陶瓷复合材料通过化学气相沉积同时共沉积碳化硅和二硅化钛而产生。 将氢，甲基三氯硅烷和四氯化钛的混合物引入含有诸如石墨或碳化硅的基材的炉中。 甲基三氯硅烷的热分解提供了碳化硅基体相，并且四氯化钛的分解在基质相内提供了金属间二硅化钛均匀分散的第二相。 陶瓷复合材料的断裂韧性在约6.5〜7.0MPa 2ROOT m的范围内，与碳化硅相比显着增加。

    Method for primary containment of cesium wastes
    10.
    发明授权
    Method for primary containment of cesium wastes 失效
    主要容纳铯废物的方法

    公开(公告)号：US4376792A

    公开(公告)日：1983-03-15

    申请号：US298969

    申请日：1981-09-03

    申请人： Peter Angelini ,  Walter J. Lackey ,  David P. Stinton ,  Raymond E. Blanco ,  Walter D. Bond ,  Wesley D. Arnold, Jr.

    发明人： Peter Angelini ,  Walter J. Lackey ,  David P. Stinton ,  Raymond E. Blanco ,  Walter D. Bond ,  Wesley D. Arnold, Jr.

    IPC分类号： G21F9/12 ,  G21F9/30 ,  G21C3/06

    CPC分类号： G21F9/302 ,  G21F9/12

    摘要： A method for producing a cesium-retentive waste form, characterized by a high degree of compositional stability and mechanical integrity, is provided by subjecting a cesium-loaded zeolite to heat under conditions suitable for stabilizing the zeolite and immobilizing the cesium, and coating said zeolite for sufficient duration within a suitable environment with at least one dense layer of pyrolytic carbon to seal therein said cesium to produce a final, cesium-bearing waste form. Typically, the zeolite is stabilized and the cesium immobilized in less than four hours by confinement within an air environment maintained at about 600.degree. C. Coatings are thereafter applied by confining the calcined zeolite within a coating environment comprising inert fluidizing and carbon donor gases maintained at 1,000.degree. C. for a suitable duration.

    摘要翻译： 通过使铯负载的沸石在适于稳定沸石和固定铯的条件下加热，并且将所述沸石涂覆在所述沸石上，从而提供特征在于高成分稳定性和机械完整性的铯保持性废物形式的方法 在合适的环境中具有足够的持续时间，其中具有至少一个致密层的热解碳以在其中密封所述铯以产生最终的含铯废物形式。 通常，沸石是稳定的，并且铯通过在保持在约600℃的空气环境中约束在少于4小时内固定。之后通过将煅烧沸石限制在包含惰性流化和碳供体气体的涂覆环境中来施加涂层 1000℃持续适宜的时间。