Abstracts of patents US patent abstracts are prepared by Dr R.J. Hand of the University of Sheffield, UK
US PATENTS COMPONENTS Fibre reinforced composite leading edge heat exchanger and method for producing same Yuen, J.L., Ash, B.A. and Purmort, W.P. (Rockwell International Corporation, El Segundo, CA USA) US Pat 5 042 565 (27 August 1991) A leading edge heat exchanger has inlet and outlet conduits connected by a number of passages with interconnections between them. The whole is made of a high thermal conductivity fibre-reinforced composite. Silicon carbide fibre-reinforced titanium base composites having improved interface properties Ritter, A.M. (General Electric Company, Schnectady, NY, USA) US Pat 5 045 407 (3 September 1991) The structural member comprises a titaniumbase alloy matrix with an alpha-2 crystal structure and silicon carbide filaments. The filaments are coated with a beta-phase stabilizer ofMo, Cr, W, Nb, Ta, lr, Pd, Zr, Hf, Re, V, Ag, Mn, Fe, Co, Ni, Cu, Au or Si; the matrix is plasma sprayed onto these filaments and then the whole is consolidated with heat and pressure such that the coating interdiffuses with the matrix to produce a crack-free beta-stabilized zone around the filaments. Composite blade with divergent root and method for making same Bailey, C. and Spain, R.G. (Airfoil Textron lnc, Lima, OH, USA) US Pat 5 049 036 (17 Septentber 1991 ) A gas turbine engine blade with an integral airfoil and root is produced from a matrixinfiltrated, three-dimensionally braided fibre preform. Inverse shape replication method of making ceramic composite articles and articles obtained thereby Newkirk, M.S., Urquhart, A.W. and Lesher, H.D. (Lanxide Technology Company, LP, Newark, DE, LISA) US Pat 5 051 382 (24 September 1991) A ceramic composite component comprises filler embedded in an oxidation reaction product of a molten metal and an oxidant which contain a shaped cavity. The cavity is formed by the removal of the parent metal from it during the oxidation process. Ceramic cutting material reinforced by whiskers Brandt, N.G.L. (Sandvik AB, Sandviken, Sweden) US Pat 5 053 363 (1 October 1991) This cutting insert for the chip-forming machining of steel comprises an oxide-based matrix and 5-50 volume% of AION whiskers.
MATERIALS Fibre-reinforced thermoplastic resin composition Ueno, K. and Tanaka, K. (Ube Industries, Ltd, Yamaguchi, Japan) US Pat 5 036 127 (30 July 1991) The composition consists of 50-99 weight% thermoplastic resin and 1-50 weight% fibrous magnesium oxysulfate, with 0.01 30 parts by weight of magnesium oxide per 100 parts by weight of fibres. Toughened thermosetting structural materials Boyd, J.D. (BASF Aktiengesellschaft, Ludwigshafen, Germany) US Pat 5 037 689 (6 August 1991) A heat-curable prepreg comprises: continuous fibres; a heat-curable bismaleimide resin monomer; a functional comonomer containing an alkenylphenol or alkenylphenoxy group or a diamine; and 1(~60 weight% (based on the total weight of the matrix resin) of soluble or swellable polyimide thermoplastic particles with a mean size of 2 50/am and which contain residues of diamines and dianhydrides. High strength thermoplastic resin/carbon fibre composites and methods Bobsein, R.L., Mills, S.D. and Stone, M.L. (Phillips Petroleum Company, Bartlesville, OK, USA) US Pat 5 039 572 (13 August 1991) The composite comprises carbon fibres and a two-component resin. The first resin component is an amine-terminated poly(arylene sulfide) and the second component is one or a mixture of the following: poly(arylene sulfide)s, polyolefins, polysulfones, polyethersulfones, polyetherimides, polyetherketones, polyetheretherketones, polyetherketoneketones and liquid crystal polymers. Fibre-reinforced light alloy member excellent in heat conductivity and sliding properites Ushio, H., Hayashi, T. and Shibata, K. (Honda Giken Kogyo Kabushiki Kaisha, Tokyo, Japan) US Pat 5 041 340 (20 August 1991) The composite consists of mixed fibres uniformly dispersed in a light alloy matrix. The mixed fibres contain 4--60 volume% ceramic fibres and 0.5-10 volume% carbon fibres. There is a thin layer of reaction product between the carbon fibres and the matrix due to heat treatment at 400~50°C. Whisker-reinforced ceramic matrix composite by injection moulding Kim, H., Collins, G.L. and Hughes, O.R. (Hoescht Celanese Corp, Somerville, N J, USA) US Pat 5 043 118 (27 August 1991) A composition for injection moulding is described which consists of a sinterable powder, a polyacetaI binding agent and silicon carbide whiskers coated with a polyacetal resin containing alkylene oxide units of 1 to 4 carbon atoms.
COMPOSITES. NUMBER 8. 1993
Reinforced plastic comprising fibrous reinforcement treated with poly(arylene sulphide sulphone) polymer containing ether groups Bobsein, R.L., Geibel, J.F., Efner, H.F. and Stone, M.L. (Phillips Petroleum Company, Bartlesville, OK, USA) US Pat 5 045 367 (3 September 1991 ) A poly(arylene sulfide sulfone) matrix contains long fibres. It is prepared by pre-contacting the fibres with a poly(arylene sulfide sulfone) containing ether groups. Fibre reinforced composite material and method for producing fibres for such material Betz, W., Huether, W. and Merz, H. (MTU Motoren-und Turbinen-Union Muenchen GmbH, Munich, Germany) US Pat 5 047 281 (10 September 1991) A fibre-reinforced composite is described wherein the fibres have interspersed regions of different adhesiveness along their length so that, at different points along the fibre length, the fibre/matrix bond is different. These different regions are designed to act as interface crack stoppers. Impact resistant filler-containing polymer]elastomeric fibre composites Howard, E.G. (E.I. Du Pont de Nemours and Company, Wilmington, DE, USA) US Pat 5 049 597 (17 September 1991) A heat-formable composite comprises an addition polymer or addition copolymer matrix, oriented thermoplastic elastomeric fibres and a filler. The filler is either a metal oxide or a metal carbonate silicon oxide provided that the metal is not an alkali metal. Coated fibre--containing composite Singh, R.N. and Gaddipati, A.R. (General Electric Company, Schnectady, NY, USA) US Pat 5 051 301 (24 September 1991) A ceramic matrix is reinforced with at least l0 volume% of boron-nitride-coated fibrous material layers and contains less than l0 volume% porosity. At least 70% of the surface area of the fibrous material is in direct contact with the matrix. Composite ceramic structures Newkirk, M.S., White, D.R. and Dwivedi, R.K. (Lanxide Technology Company, LP, Newark, DE, USA) US Pat 5 053 367 (1 October 1991) The body comprises a filler material embedded in a three-dimensionally interconnected oxidation reaction product of a parent metal and an oxidant which contains 1~,0 volume% of interconnected unreacted parent metal. The filler is another oxidation reaction product of the parent metal and an oxidant and contains either metal channels or voids. Carbon coated silicon carbide, silicon nitride or SiAION fibres in a ceramic matrix Sakamoto, H. and Miyoshi, T. (Hitachi Ltd, Tokyo, Japan) US Pat 5 055 430 (8 October 1991) A ceramic composite with a matrix of Si3N4 or Si~.:AI:O:N~.:, where 0 < z < 4, contains fibres or whiskers of SiC, Si3N4 or Si6_:AI:O:Ns:, where 0 < z < 4 . The fibres are 10 200 p_m in diameter and the whiskers are 0.5 5 pro, and