Method and apparatus for forming fibre-reinforced resin articles

Method and apparatus for forming fibre-reinforced resin articles

A method of producing glass fibrereinforced synthetic resin products Method and apparatus for forming fibre-reinforced resin articles A composite st...

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A method of producing glass fibrereinforced synthetic resin products

Method and apparatus for forming fibre-reinforced resin articles

A composite structure and a method of forming it

Wesch, L. UK Patent Specification,

Whitehead, A. UK Patent Specifica-

Wizon,

1,173,193 (3 December 1969)

tion, 1,176,794 (7January 1970)

A glass fibre reinforced composite can be produced more economically by adding filler material, while still maintaining the strength properties of the composite. The filler material, limited to one third of the total weight, should be coated with a silane, to ensure a good bond with the resin matrix. Materials envisaged are based on silica and]or oxides of aluminium, titanium or zirconium. Ground quartz is an example. Preparation of the filler for incorporation in the composite is described. Better compressive strengths are possible with this composition in a filament-wound article.

Strips of fibre reinforcement are arranged to form the required shape and are subsequently impregnated with resin and cured. In one configuration, the reinforcement is formed in an H-section. The fabrication rig comprising guides and a bath of liquid resin are detailed. Glass fibres, in the form of woven or chopped strand mat, may be used as the reinforcement. The bath relies on surface tension to retain the liquid resin. Various cross sections of reinforcement are presented diagrammatically.

I. UK Patent Specification, 1,1 73, 740 (10 December 1970)

Various methods are described for the production of a structure comprising two layers of metal and a fibrous layer bonded between the metal. A cellulosic spinning solution with added glass-forming compounds is introduced to produce filaments in situ. The filaments may be sintered. Other methods utilize molten aluminium within the cavity formed by the metal plates, to decompose and carbonise the cellulosic material. The addition of a high temperature resistant synthetic resin improves the ablative properties of the composite for whi,:h the invention is intended.

Abstracts Compiled by Dr H. A. Barker, I. Bell, B. Gill and R. Warren, Department of Metallurgy and Materials Technology, University of Surrey, Guildford

Copies o f original articles are best obtained by writing directly m the journal & which they appeared. The addresses o f journals can be found in 'World list o f scientific and technical publications', 'Willings press guMe', 'Newspaper press directory ' and for American ]ournals only, 'Ayers ' Ceramic m a t r i c e s

Calcium hydroxide as a binder in portland cement paste

U O 2 - W cermets produced by unidirectional solidification

BERGER, R. L., CAHN, D. S. and McGREGOR, J. D.

CHAPMAN, A. T., CLARK, G. W. and HENDRIX, D. E.

J Am Ceram Soc, Vol 53, No 1, pp 57 58 (January 1970)

J Am Ceram Soc, Vol 53, No 1, pp 60 - 61 (January 1970)

The fracture surface of a portland cement specimen containing about 3 vol % carbon filaments was examined with a scanning electron microscope. It was found that much of the bond between the filaments and the cement matrix involved the crystalline calcium hydroxide phase of the cement. It is suggested that the calcium hydroxide, which crystallizes and grows during the curing process of the cement, plays a larger part in the bonding of the cement than was previously thought. (70/2/12)

A modified floating zone process was used to produce composites of wellaligned W filaments in a UO2 matrix by unidirectional eutectic solidification. Preliminary tests showed a considerable improvement in the creep properties and thermal conductivity of the composite when compared with pure UO2. It is pointed out that to obtain such a microstructure in this system is not to be expected if predictions based on entropy of melting or mutual solubility are used. (70/2/13)

Glass fibre concrete

will bring new life to

PETERS, D.

The Engineer. p 37 (January 1970) The effect on present production methods of the discovery of an economical glass fibre that strengthens concrete is discussed in this review article. The combination of commercial glass fibre and alumina cement both in this country and the USSR is mentioned as is the fact that the Building Research Station in this country are looking for a glass which will resist the alkaline attack of Portland cement. The likely problems of marketing and a look into the future are offered as concluding paragraphs. (70/2/14t

Mechanical properties and fracture behaviour of chemically bonded composites. STETT, A. and F U L R A T H , R. M.

J Am Ceram Soc, Vol 53, No 1, pp 5 13 (January 1970) Composites of Ni spheres in glass matrices were fabricated by hot pressing. The glass was chosen to have larger, smaller or the same thermal expansion as the Ni. By subjecting the Ni spheres to varying degrees of prior

COMPOSITESJune 1970

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