High-temperature materials

High-temperature materials

A metal or alloy which serves above about 1000°F (540°C). More specifically, the materials which operate at such temperatures consist principally of some stainless steels, superalloys, refractory metals, and certain ceramic materials. The giant class of alloys called steels usually see service below 1000°F. The most demanding applications for high-temperature materials are found in aircraft jet engines, industrial gas turbines, and nuclear reactors. However, many furnaces, ductings, and electronic and lighting devices operate at such high temperatures.

In order to perform successfully and economically at high temperatures, a material must have at least two essential characteristics: it must be strong, since increasing temperature tends to reduce strength, and it must have resistance to its environment, since oxidation and corrosion attack also increase with temperature. See Corrosion

High-temperature materials, always vital, have acquired an even greater importance because of developing crises in providing society with sufficient energy. The machinery which produces electricity or some other form of power from a heat source operates according to the basic Carnot cycle law, where the efficiency of the device depends on the difference between its highest operating temperature and its lowest temperature. Thus, the greater this difference, the more efficient is the device—a result giving great impetus to create materials that operate at very high temperatures. See Carnot cycle, Efficiency

References in periodicals archive ?
The wide range of engineering resins and high-temperature materials in small-lot compounds, together with our locally-produced masterbatches in India, will save a considerable amount of time for our customers in their production pipeline, while reducing significantly costs involved in logistics and having enhanced formulation expertise.
Robust urbanisation, increasing trend towards minituarisation, ongoing improvements in high-temperature technologies are giving a boost to the demand for high-temperature materials, thus, opening opportunities for high temperature silicones (usually operating at temperature around and above 150[degrees]C).
They are, then, molded and cured to form rigid, high-temperature materials.
It is also available for high-temperature materials, PVC processing and blown film extrusion.
Recommended for use behind a primary pre-cleaner on the face of the head pulley, the color-coded, high-performance urethane secondary cleaners can be specified for acidic or high-temperature materials.
The extruder can also handle high-temperature materials like PEEK as well as nylons and TPU.
Structural Alloys for Power Plants: Operational Challenges and High-Temperature Materials
For power plant operators and engineers, high-temperature materials scientists, and power industry professionals, this technical guide presents 10 contributions on the nitty-gritty of cleaner, more efficient use of coal.
Comets formed in the frigid Kuiper belt out beyond Neptune, but analyses of the Wild 2 samples showed that comets are composed of low-temperature and high-temperature materials that must have come from completely different environments.
1 November 2011 - US graphite and carbon based-products manufacturer GrafTech International Ltd (NYSE:GTI) announced it had completed the purchase of Fiber Materials Inc (FMI), a US producer of high-temperature materials and advanced composites.
Because superalloys not only stand up to high temperatures, but also prove more resilient than other high-temperature materials, they are found in many applications.
Alloys on basis of TiAl and Ti3Al titanium alu-minides are considered in recent years as promising high-temperature materials.

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