Development of Parameters Optimization Technology for Obtaining Composite Materials and Coatings with Shape Memory Effect

Abstract

The paper studies the technology of producing composite materials and coatings by means of high-velocity oxygen-fuel spraying (HVOF) in a protective atmosphere. We have developed technologies for the formation of nanostructured surface layers made of multicomponent materials in the conditions of high-velocity oxygen-fuel spraying in order to improve operational properties and expand functional capabilities of engineering products. We optimized technological parameters and constructed nomograph of the process. We described a modernized GLC-720 unit which implements the resource-saving technology for the formation of nanostructured surface layers on cylindrical details, and makes it possible to produce HVOF in a protective atmosphere and thermomechanical processing in a single technological cycle.

Effect of Mechanical Activation on the Structural Parameters of Ceramic Powders cBN-Co, hBN-Co

“…Mechanical activation (MA) changes the properties and reactivity of ceramic powders based on BN, which is confirmed by the following studies [1][2][3][4][5]. Different grinding equipment, ball mills, vibratory and jet mills, attritors, disintegrating agents and planetary mills are used for MA.…”

“…MA of hBN powder was carried out for 30, 60, 120 and 240 seconds and hBN powder without activation was used as a basis for comparison. For surface modification of shape memory materials composite powder materials of different chemical composition are often used [1][2][3][4]. One advantage of using MA in the cycle of surface layer complex formation is the possibility to create a coating material with required chemical composition and particle size.…”