Journal of Materials for Energy Systems 

About: Journal of Materials for Energy Systems is an academic journal. The journal publishes majorly in the area(s): Corrosion & Stress corrosion cracking. It has an ISSN identifier of 0162-9719. Over the lifetime, 236 publications have been published receiving 1517 citations.

High temperature corrosion problems in waste incineration systems

Abstract: Corrosion of high temperature metal surfaces in waste incineration systems results primarily from compounds of chlorine, sulfur, and metals such as lead, zinc, and tin. The presence of such compounds in municipal refuse and chemical wastes can result in severe metal wastage in energy recovery systems. The corrosion mechanism involves interaction of sulfur oxides with chlorides in deposits to generate HCl and chlorine at the metal surface. Metal chlorides also can contribute by forming low melting eutectics. Reducing atmospheres, particularly carbon monoxide, in the combustion gases also appear to be a factor in corrosion. Corrosion rates of carbon and low alloy steels increase significantly with both metal temperature and gas temperature. The rates for stainless steels initially decrease as the metal temperature increases, and are less sensitive to gas temperature. Corrosion by chlorine can be inhibited by maintaining a sufficiently high concentration of sulfur or silica in the fuel. The results of corrosion probe exposures in waste-fueled boilers are presented to illustrate these mechanisms.

Polymer, metal, and ceramic matrix composites for advanced aircraft engine applications

Abstract: Advanced aircraft engine research within NASA Lewis focuses on propulsion systems for subsonic, supersonic, and hypersonic aircraft. Each of these flight regimes requires different types of engines, but all require advanced materials to meet their goals of performance, thrust-to-weight ratio, and fuel efficiency. The high strength/weight and stiffness/weight properties of resin, metal, and ceramic matrix composites will play an increasingly key role in meeting these performance requirements. At NASA Lewis, research is ongoing to apply graphite/polyimide composites to engine components and to develop polymer matrices with higher operating temperature capabilities. Metal matrix composites, using magnesium, aluminum, titanium, and superalloy matrices, are being developed for application to static and rotating engine components, as well as for space applications, over a broad temperature range. Ceramic matrix composites are also being examined to increase the toughness and reliability of ceramics for application to high-temperature engine structures and components.

Exploratory corrosion tests on alloys in molten salts at 900 °C

Abstract: Exploratory corrosion tests were conducted on 16 commencai alloys in carbonate, chloride, and hydroxide molten salts at 900 °C for up to three weeks. Corrosion information, including weight change, observations of the coupons, metallographic examination, and evaluation of the corrosion product by SEM, was obtained on the coupons exposed to these salts. These tests indicated that a number of the alloys showed significant resistance to metal loss in the carbonate molten salt with corrosion rates on the order of several millimeters per year. The corrosion product is an interpenetrating structure of metal from the more noble alloy ingredients and of an oxide made up of the reaction between melt components and oxidizable metals from the alloys.

Abrasive wear in multiphase microstructures

Abstract: General theories of abrasive wear are reviewed, and wear is related to abrasive size, shape, hardness and degradation tendency The effects of matrix and second phase flowfracture properties on abrasive wear resistance are discussed Treatment of matrix effects includes the roles of matrix microhardness, subsurface deformation and retained austenite on abrasion resistance Discussion of second phase particle effects includes abrasion in carbon steels, and wear in systems containing fine, medium and coarse carbides Throughout the paper, general guidelines are presented for alloy design and material selection for abrasion resistance, where such guidelines appear to have validity At the same time, examples are given of the more usual situation in which abrasive wear is a highly specific function of microstructure and abrasive properties In these latter cases, the specific parameters which control abrasion resistance are delineated

Metal hydrides for energy storage

Abstract: Metal hydrides provide an efficient and safe method for storing hydrogen. Hydrogen can be stored indefinitely and released as needed for a number of energy usages. The commercially available alloys for storage are LaNi5-based, FeTi-based, and Mg-based alloys. In this paper we conduct an overall review of these alloys and compare them with other alloys, and in particular with zirconium based binaries and pseudobinaries. Also described in this paper is the apparatus required for hydrogen absorption and desorption experiments.