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E-book Particulars :
Language English
Pages 1115
Format PDF
Measurement 3.52 MB

Materials Handbook Fifteenth Version by George S. Brady

Book Description:

The Materials Handbook is an encyclopedic, A-to-Z organization of all types of materials, featuring their key performance properties, principal characteristics and applications in product design. Materials include ferrous and nonferrous metals, plastics, elastomers, ceramics, woods, composites, chemicals, minerals, textiles, fuels, foodstuffs and natural plant and animal substances –more than 13,000 in all. Properties are expressed in both U.S. customary and metric units and a thorough index eases finding details on each and every material. Introduced in 1929 and often known simply as “Brady’s,” this comprehensive, one-volume, 1244 page encyclopedia of materials is intended for executives, managers, supervisors, engineers, and technicians, in engineering, manufacturing, marketing, purchasing and sales as well as educators and students. Of the dozens of families of materials updated in the 15th Edition, the most extensive additions pertain to adhesives, activated carbon, aluminides, aluminum alloys, catalysts, ceramics, composites, fullerences, heat-transfer fluids, nanophase materials, nickel alloys, olefins, silicon nitride, stainless steels, thermoplastic elastomers, titanium alloys, tungsten alloys, valve alloys and welding and hard-facing alloys. Also widely updated are acrylics, brazing alloys, chelants, biodegradable plastics, molybdenum alloys, plastic alloys, recyclate plastics, superalloys, supercritical fluids and tool steels. New classes of materials added include aliphatic polyketones, carburizing secondary-hardening steels and polyarylene ether benzimidazoles. Carcinogens and materials likely to be cancer-causing in humans are listed for the first time. (20021001)

ABLATIVES. Materials used for the outward dissipation of extraordinarily excessive heats by mass elimination. Their commonest use is as an exterior warmth protect to guard supersonic aerospace autos from an extreme buildup of warmth brought about by air friction on the floor. The ablative materials will need to have a low thermal conductivity so that the warmth might stay concentrated within the skinny floor layer. Because the floor of the ablator melts or sublimes, it’s wiped away by the frictional forces that concurrently warmth newly uncovered surfaces. The warmth is carried off with the fabric eliminated. The much less materials that’s misplaced, the extra environment friendly is the ablative materials. The ablative materials additionally ought to have a excessive thermal capability within the strong, liquid, and gaseous states; a excessive warmth of fusion and evaporation; and a excessive warmth of dissociation of its vapors. The ablative agent, or ablator, is normally a carbonaceous natural compound, corresponding to a phenolic plastic.

Because the dissociation merchandise are misplaced as liquid or vapor, the char is held in place by the refractory reinforcing fibers, nonetheless giving a measure of warmth resistance. The efficient lifetime of an ablative is brief, calculated in seconds per millimeter of thickness for the gap traveled within the environment. Single ablative supplies seldom have all of the fascinating elements, and thus composites are used. Phenolic or epoxy resins are bolstered with asbestos material, carbonized material, or refractory fibers, corresponding to asbestos, fused silica, and glass. The refractory fibers not solely are integrated for mechanical power, but additionally have a operate within the ablative course of, and surface-active brokers could also be added to hurry the speed of evaporation. One other composite, polyarylacetylene (PAA) bolstered with carbon fiber material, proved superior to carbon-reinforced phenolic in checks to develop another ablative and insulative materials for nozzle elements of strong rocket motors. Favoring the PAA is its excessive (90%) char yield, decrease weight reduction and erosion, better moisture resistance, and extra secure ablation. Ablative paint, for safeguarding woodwork, could also be natural silicones which convert to silica at temperatures above 2000°F (1093°C).

Materials Handbook: An Encyclopedia for Managers, Technical Professionals, Purchasing and Production Managers, Technicians, Supervisors PDF

Author(s): H. R. Claus George S. Brady

Year: 2002

ISBN: 0070070717,9780070070714

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