Abstract:
Apparatus and method for developing polymer derived ceramic downhole equipment including completion structure, isolation plugs, hanger systems, marine risers, risers, packer assemblies and sucker rods. In various approaches, one or more of downhole components, surfaces or structure can embody polymer derived ceramic material, and, in particular, polysilocarb derived material and polysilocarb derived ceramic material.
Abstract:
A polycrystalline super hard construction comprises a body of polycrystalline diamond (PCD) material and a plurality of interstitial regions between inter-bonded diamond grains forming the polycrystalline diamond material. The body of PCD material comprises a working surface positioned along an outside portion of the body, and a first region adjacent the working surface, the first region being a thermally stable region. The first region and/or a further region and/or the body of PCD material has/have an average oxygen content of less than around 300ppm. A method of forming such a construction is also disclosed.
Abstract:
A method of densifying a CMC article includes the steps of pyrolyzing a CMC article until a desired initial porosity is achieved, coating CMC pores within the CMC article with carbon, pyrolyzing the carbon to form carbon pores, coating the carbon pores with silicon, and heat treating the CMC article to create a silicon carbide filled pore integrated with silicon carbide of the CMC article to densify the CMC article.
Abstract:
A disclosed method of forming a ceramic article includes forming a pre-ceramic polymer article within a mold tool, and performing a first pyrolizing step on the initial pre-ceramic polymer article to form a ceramic article. The method further includes performing at least one pre-heat treatment polymer infiltration and pyrolizing (PIP) cycle on the ceramic article and an initial heat treatment cycle of the ceramic article after the at least one pre-heat treatment PIP cycle. Subsequent PIP cycles and heat treatment cycles are performed in combination to form a ceramic article including a desired density.
Abstract:
A method of fabricating a ceramic article includes serially depositing first, second and third different materials within a porous structure using, respectively, first, second and third different processing techniques, to form a ceramic-containing article. The first, second and third materials differ by at least one of composition and microstructure. The first, second and third different processing techniques differ by at least one of modes of delivery of precursor materials into the porous structure and formation mechanisms of the first, second and third different materials from the precursor materials. The deposition of the first material is controlled such that there are first residual voids in the porous structure in which the second material is deposited. The deposition of a second material is controlled such that there are second residual voids in the porous structure in which the third material is deposited.
Abstract:
A fiber having an environmental barrier coating is provided that includes, in one illustrative form, a Hi Nicalon preform assembled in a tooling for chemical vapor infiltration and cleaned to remove sizing char from fibers of the Hi Nicalon preform; a ytterbium doped silicon carbide coat located over the Hi Nicalon preform; a boron nitride interface coat applied over the ytterbium doped silicon carbide coat; and a silicon carbide coat applied over the boron nitride interface coat. In another embodiment the fiber has an environmental barrier coating, comprising: a Hi Nicalon S fiber; wherein the Hi Nicalon S fiber is coated in tow form with yttrium doped silicon carbide; and a silicon doped boron nitride coat applied over the yttrium doped silicon carbide. In a third embodiment the fiber has an environmental barrier coating, comprising: a T-300 carbon fiber preform assembled in tooling for chemical vapor infiltration; alternating layers of silicon carbide and boron carbide are applied over the preform; and a silicon doped boron nitride interface coat applied over the silicon carbide coat.
Abstract:
Methods and materials for forming in-situ features in a CMC component (200) are described. The method of forming a ceramic matrix composite component with cooling features, comprises forming a preform tape (120), laying up (122) said preform tape to a desired shape, placing a high-temperature resistant fugitive material insert (30) of preselected geometry in the preform tape of the desired shape, compacting (134) the preform tape of the desired shape, burning out (138) the preform tape of the desired shape, melt infiltrating (140) the desired shape, removing the high-temperature resistant insert to form the cooling features during one of the burning out or the melt infiltrating or following the burning out or the melt infiltrating.
Abstract:
Es werden Siliziumcarbid-Verbundwerkstoffe beschrieben, wobei diese CSiC mit einer Dichte von 2,95 bis 3,05 g/cm -3 und einem Faserbündelanteil von 2 bis 10 Gew.% umfassen, bei dem die Faserbündel eine Länge von 6 bis 20 mm, eine Breite von 0,2 bis 3 mm und eine Dicke von 0,1 bis 0,8 mm aufweisen, die Faserbündel mit einem ausgehärteten Phenolharzanteil von zu 45 Gew.% gefüllt sind und diese geschützten Faserbündel in eine SiC Matrix integriert sind, sowie ein Verfahren zur Herstellung der Siliziumcarbid-Verbundwerkstoffe und deren Verwendung.
Abstract translation:本发明的目的是提供一种在耐水垢性,耐热冲击性和机械冲击性方面优异的成型无机纤维物体,并且在加热到高温时被抑制收缩。 成型无机纤维物体是通过用含有由通式Mg x Al y O 4(其中y / x原子比为2以上)表示的尖晶石化合物的前体的液体物质浸渍无机纤维的针刺层而得到的,然后干燥 浸渍的毯子,并烧干燥的毯子以将前体转化为氧化物。