Stresses in coatings obtained by electro-spark alloying and laser processing (review)

High-energy treatments (electric-spark alloying, laser processing) give rise to residual stresses in the surface layers of processed materials. Their distribution during the electric-spark alloying depends on the applied alloying metal. Under laser treatment the stress distribution depends on the radiation power, the treatment speed and the distance between the sections to be processed. The value, the sign, and regularities of stress distribution significantly affect the working properties of machine parts. Frantsevich Institute of Material Study Problems, Ukrainian Academy of Sciences, Kiev. Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 33, No. 6, pp. 31–38, November–December, 1997.     

Graphene: A novel carbon nanomaterial

This review analyzes what the term graphene means today, and examines graphene preparation and identification methods and its chemical properties. The applications of this novel carbon nanomaterial are briefly discussed.     

Characteristics of the Process of Coal-Water Fuels Spraying with Additives of Liquid Waste from Industrial Rubber Goods Processing

Chemical and Petroleum Engineering - Parameters of the process of coal-water fuels spraying (characteristics of the fuel jet) with addition of liquid waste from processing of industrial rubber...     

Utilization of Coal-Mining Waste in the Production of Building Ceramic Materials

It is established that coal-mining waste used in joint (moist or dry) preparation of mixtures is a promising material for the production of building ceramics. The waste content in the batch may reach 50%. The quality of the products made using coal-mining waste from the Moscow Region fully meets the requirements of GOST 6841–84 for respective products.