Interface compatibility in ceramic-matrix composites

Critical issues of interface modifications in ceramic-matrix composites have been investigated. Minimal interaction between the fiber and the matrix is essential to achieving good toughness in ceramic-fiber-reinforced Si-C-O composites. Introduction of a thin barrier coating on the fiber surface has been utilized to minimize such interact..

Deformation micromechanics in model carbon fiber reinforced composites part II: themicrobond test

Raman spectroscopy is used to study the deformation micromechanics of the microbond test for a carbon fiber epoxy resin system using surface-treated and untreated PAN-based fibers, and the results are compared with those of the conventional microbond test

Effect of reinforcing fibres on the morphology of a toughened epoxy/amine system

The effect of reinforcing fibres on the morphology of a thermoplastically toughened tri-functional epoxy resin cured with an aromatic hardener has been studied using optical microscopy. Single and multiple strands of different types of fibres were placed within curing resin matrices containing varying thermoplastic concentrations. The fib..

The effect of temperature on the dynamic characteristics of heat-resistant thermoplastic compoites

Two thermoplastic and two thermosetting fibre-reinforced plastic composites were subjected to dynamic tests over a wide range of temperature, covering both cryogenic and hot environments. The thermal behaviour of each composite, as indicated by its dynamic mechanical proeprties, was assessed individually, and compared collectively with th..

FILTER CLOTH PERFORMANCE STUDIES ON CEMENT DUST.

The cement industry requires filter media to prevent environmental pollution and the loss of costly cement dust. A needlepunched polyester nonwoven fabric was tested for its ability to serve as a filter media for cement dust. The fabric was selected because of its high permeability and filtration efficiency, its tendency to resist binding..

CARPET CLANING INSTALLATION OF MODULAR CONSTRUCTION

Kalin Maschinenfabrik offers a range of machines that clean carpets as they come from the carpet loom, a pretreatment process, or a preparatory machine prior to printing. Thorough cleaning of the carpet surface to remove dirt, dust, lint, and thread remnants is essential for the production of quality carpets. Kalin's machines use a variet..

PIPELINES RESISTAN TO EARTHQUAKES

Tokyo Gas KK and Ashimorl Kogyo have developed a lining to prevent rupture of underground pipes during earthquakes. The lining, which is described in United States patent 5 077 107, is comprised of a tubular textile jacket and a layer that is impervious to air. The woven fabric textiles jacket is made of high-tenacity polyester warp yarns..

THREE-DIMENSIONAL STRESS-ORIENTED PREFORMS.

UMIST researchers have been attempting to solve the following problems associated with making three-dimensional textile structures: 3-D structures must be woven in two-dimensional form and then converted into the desired 3-D shape; and conventional looms produce fabrics using two systems of yarns--warp and weft--which are normally arrange..

GLASS FIBER COMPOSITES FOR RAILWAY TRACK INSULATION

Permall Gloucester produces glass fiber composites for use as insulating joints on the shunting tracks of the Docklands Light Railway. The composities are fitted to either side of the running rails to ensure rigidity and electrical insulation. The Comp E2 joints will be made using a combination of woven and unidirectional nonwoven glass r..

FLEXURAL PROPERTIES OF SEWN CARBON FIBER COMPOSITES

Layers of carbon fiber composite prepreg were sewn together to examine the effect on flexural performance. Layers were hand-laid conventionally and, prior to curing in an autoclave, were sewn together with a range of reinforcing threads. A small but significant improvement in flexural performance was achieved, particulary when the layers ..