Method of making a continuous ceramic fiber composite hot gas filter
    1.
    发明授权
    Method of making a continuous ceramic fiber composite hot gas filter 失效
    制造连续陶瓷纤维复合热气过滤器的方法

    公开(公告)号:US5876537A

    公开(公告)日:1999-03-02

    申请号:US788717

    申请日:1997-01-23

    摘要: A ceramic fiber composite structure particularly suitable for use as a hot gas cleanup ceramic fiber composite filter and method of making same from ceramic composite material has a structure which provides for increased strength and toughness in high temperature environments. The ceramic fiber composite structure or filter is made by a process in which a continuous ceramic fiber is intimately surrounded by discontinuous chopped ceramic fibers during manufacture to produce a ceramic fiber composite preform which is then bonded using various ceramic binders. The ceramic fiber composite preform is then fired to create a bond phase at the fiber contact points. Parameters such as fiber tension, spacing, and the relative proportions of the continuous ceramic fiber and chopped ceramic fibers can be varied as the continuous ceramic fiber and chopped ceramic fiber are simultaneously formed on the porous vacuum mandrel to obtain a desired distribution of the continuous ceramic fiber and the chopped ceramic fiber in the ceramic fiber composite structure or filter.

    摘要翻译: 特别适合用作热气体清除陶瓷纤维复合材料过滤器的陶瓷纤维复合结构体及其从陶瓷复合材料制成的陶瓷纤维复合材料结构具有提高高温环境中强度和韧性的结构。 陶瓷纤维复合结构或过滤器是通过在制造过程中连续陶瓷纤维被不连续切碎的陶瓷纤维紧密地包围的方法制成的,以制备陶瓷纤维复合材料预成型件,然后使用各种陶瓷粘合剂粘合。 然后烧制陶瓷纤维复合材料预制件,以在纤维接触点产生结合相。 当连续陶瓷纤维和短切陶瓷纤维同时形成在多孔真空心轴上以获得连续陶瓷纤维和短切陶瓷纤维的期望分布时,可以改变纤维张力,间距和连续陶瓷纤维和短切陶瓷纤维的相对比例等参数 纤维和切碎的陶瓷纤维在陶瓷纤维复合结构或过滤器中。

    Ceramic composites containing weak interfaces with ABO4 tungstate, molybdate, tantalate, and niobate phases
    2.
    发明授权
    Ceramic composites containing weak interfaces with ABO4 tungstate, molybdate, tantalate, and niobate phases 失效
    包含与ABO4钨酸盐,钼酸盐,钽酸盐和铌酸盐相的弱界面的陶瓷复合材料

    公开(公告)号:US06218324B1

    公开(公告)日:2001-04-17

    申请号:US09007280

    申请日:1998-01-14

    IPC分类号: C04B3510

    摘要: Ceramic composites containing weak interfacial boundaries included for the purposes of providing avenues for crack deflection with a resulting toughening of a ceramic body. Weak interfacial boundaries are created between constituents of the composite, such as matrix phases and any continuous and/or particulate reinforcements, and tungstate, molybdate, tantalate, and niobate compounds of the general formula ABO4. For tungstate and molybdate compounds of the general formula ABO4, B represents tungsten or molybdenum, and A represents a divalent cation. For tantalate and niobate compounds of the general formula ABO4, B represents tantalum or niobium, and A represents a trivalent lanthanide series cation. The ABO4 tungstate, molybdate, tantalate, and niobate compounds may exist as barrier phases between the matrix and the reinforcements of the composite, or the ceramic body may contain discrete particulates, laminae, fibers, or whiskers of the ABO4 tungstate, molybdate, tantalate, and niobate compounds. In a preferred embodiment, the reinforcing phases of the composite is a continuous single or polycrystalline fiber; however, particulate or whisker reinforcements will also benefit by being separated from the matrix phases by an interphase of an ABO4 tungstate, molybdate, tantalate, or niobate. A non-brittle material may also be fabricated by creating multilayer laminar composites containing alternating lamina of the ABO4 compound and a second phase.

    摘要翻译: 包含弱界面边界的陶瓷复合材料包括为了提供裂纹偏转的途径,导致陶瓷体的增韧。 在复合材料的成分之间产生弱的界面边界,例如基体相和任何连续和/或颗粒增强物以及通式ABO 4的钨酸盐,钼酸盐,钽酸盐和铌酸盐化合物。 对于通式ABO 4的钨酸盐和钼酸盐化合物,B表示钨或钼,A表示二价阳离子。 对于通式ABO4的钽酸盐和铌酸盐化合物,B表示钽或铌,A表示三价镧系元素阳离子。 ABO4钨酸盐,钼酸盐,钽酸盐和铌酸盐化合物可以作为基质和复合材料的增强物之间的屏障相存在,或者陶瓷体可以包含ABO4钨酸盐,钼酸盐,钽酸盐的离散颗粒,层,纤维或晶须, 和铌酸盐化合物。 在优选的实施方案中,复合材料的增强相是连续的单晶或多晶纤维; 然而,颗粒状或晶须增强材料也将受益于通过ABO4钨酸盐,钼酸盐,钽酸盐或铌酸盐的界面与基体相分离。 还可以通过产生包含ABO4化合物的交替层板和第二相的多层层状复合材料来制造非脆性材料。

    A method of densifying a glass or glass composite structure
    3.
    发明授权
    A method of densifying a glass or glass composite structure 失效
    一种致密化玻璃或玻璃复合结构的方法

    公开(公告)号:US5122176A

    公开(公告)日:1992-06-16

    申请号:US466580

    申请日:1990-01-17

    摘要: A method of densifying glass-composite structures using a superplastically deformed foil to partially encapsulate a glass-composite part and a part holding die. The die and part are contained in a rigid box held in a press. The foil is deformed over the die and part. Heat and pressure are applied to the die and part, through the rigid box, to soften the glass matrix of the part and to cause the glass to flow into the voids of the part.

    摘要翻译: 使用超塑性变形的箔致密化玻璃 - 复合结构以部分地包封玻璃 - 复合材料部件和部件保持模具的方法。 模具和部件被包含在保持在压机中的刚性盒中。 箔片在模具和零件上变形。 将热和压力通过刚性盒施加到模具和部件上,以软化部件的玻璃基体并使玻璃流入部件的空隙。

    Continuous deposition of bridge free interfacial coatings on
multifilamentary ceramic fiber tows
    4.
    发明授权
    Continuous deposition of bridge free interfacial coatings on multifilamentary ceramic fiber tows 失效
    在多纤维陶瓷纤维丝束上连续沉积无桥面界面涂层

    公开(公告)号:US5716671A

    公开(公告)日:1998-02-10

    申请号:US252809

    申请日:1994-06-02

    摘要: A method for coating ceramic fibers such as Al.sub.2 O.sub.3 fibers includes immersing the Al.sub.2 O.sub.3 fibers in a polyelectrolyte solution. After the polyelectrolyte is allowed to adsorb on the fibers, the unabsorbed polyelectrolyte is washed from the fibers with a distilled water. The fibers are then deposited in an oxide solution such as SnO.sub.2. The SnO.sub.2 is allowed to adsorb on the fibers, and then the unabsorbed SnO.sub.2 is washed from the fibers with the distilled water. The fibers are then sintered at a temperature ranging from 400.degree. C. to 1200.degree. C.

    摘要翻译: 用于涂覆陶瓷纤维如Al 2 O 3纤维的方法包括将Al 2 O 3纤维浸入聚电解质溶液中。 将聚电解质吸附在纤维上之后,用蒸馏水从纤维中洗涤未吸收的聚电解质。 然后将纤维沉积在诸如SnO 2的氧化物溶液中。 使SnO 2吸附在纤维上,然后用蒸馏水从纤维中洗涤未吸收的SnO 2。 然后将纤维在400℃至1200℃的温度下烧结。