Obrabotka Metallov 2020 Vol. 22 No. 3

OBRABOTKAMETALLOV Vol. 22 No. 3 2020 67 MATERIAL SCIENCE References 1. Kumar G.B.V., Rao C.S.P., Selvaraj N., Bhagyashekar M.S. Studies on Al6061-SiC and Al7075-Al 2 O 3 Metal Matrix Composites. Journal of Minerals & Materials Characterization & Engineering , 2010, vol. 9, iss. 1, pp. 43– 55. DOI: 10.4236/jmmce.2010.91004. 2. Orlova L.A., ChainikovaA.S., Popovich N.V., LebedevaY.E. Composites based on aluminum-silicate glass ceramic with discrete fi llers. Glass and Ceramics , 2013, vol. 70, iss. 3–4, pp. 149–154. DOI: 10.1007/s10717-013-9529-2. 3. Sweet G.A., Brochu M., Hexemer R.L., Donaldson I.W., Bishop D.P. Consolidation of aluminum-based metal matrix composites via spark plasma sintering. Materials Science and Engineering : A, 2015, vol. 648, pp. 123–133. DOI: 10.1016/j.msea.2015.09.027. Mineral Ceramic Composite Material: Synthesis and Friction Behavior Aleksandr Bolotov a , Vladislav Novikov b, * , Olga Novikova c Tver State Technical University, 22 Af. Nikitin Emb., Tver, 170026, Russian Federation a https://orcid.org/0000-0003-4054-5550, alnikbltov@rambler.ru , b https://orcid.org/0000-0001-5670-1250, vnvkv@yandex.ru, c https://orcid.org/0000-0003-4133-3541, onvk@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2020 vol. 22 no. 3 pp. 59–68 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2020-22.3-59-68 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 08 April 2020 Revised: 16 April 2020 Accepted: 02 June 2020 Available online: 15 September 2020 Keywords : Mineraloceramic Composite Material Microarc oxidation Anti-friction properties Abrasive properties Friction Wear ABSTRACT Introduction. Thecompositionandstructureofmineralceramiccompositematerialsaffectitsphysicomechanical and tribotechnical properties. Despite its wide variety, some part does not have high tribotechnical characteristics. Therefore, the development of a technology for producing new mineral ceramic composite material is a relevant objective. The paper proposes to develop the fundamentals of the technology for producing a new mineral ceramic material by microarc oxidation of sintered diamond-aluminum blank. The material consists of an aluminum oxide matrix and dispersed inclusions of copper metallized diamond. The technological characteristics of its production and tribotechnical characteristics are still understudied. Work objective: to work through the stages of synthesis of a new mineral ceramic composite material, to study its frictional properties and to determine the application area. The paper studies the modes of blank pressing, sintering and further microplasma synthesis of mineral ceramic material with different relative density of samples, diamond concentration and dispersion, its degree of copper metallization. Tribotechnical properties of the obtained materials are also investigated. The research methods are compression tests, material surface studies, and comparative friction tests. Results and discussion . It is revealed that the main factors that determine the product performance are: the relative density of samples, the degree of copper metallization of diamonds and alkali concentration in an electrolyte. The grain size of diamonds determines tribotechnical characteristics and the practical application of cermet. Materials with diamond grain size more than 28/20 showed high cutting characteristics and good diamond holding ability. The volumetric cutting ability is higher than traditional counterparts have, and it does not decrease over time. Tribotechnical tests of ceramic materials with diamond grain size less than 20/14 showed that it has good antifriction properties even without lubricating media. The wear rate of antifriction cermet is comparable to D16 oxidized alloy; its friction coef fi cient is signi fi cantly lower. The authors propose a criterion called a critical nominal pressure that determines the transition from a predominantly elastic contact to brittle fracture of a mineral ceramic material. The created mineral ceramic materials with high diamond grain size are promising as instrumental materials for precision abrasive microprocessing of hard materials. Ceramic materials with a small grain size of diamonds are good for producing parts of friction units operating under lubricant shortage. For citation: Bolotov A.N., Novikov V.V., Novikova O.O. Mineral ceramic composite material: synthesis and friction behavior. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) =Metal Working andMaterial Science , 2020, vol. 22, no. 3, pp. 59–68. DOI: 10.17212/1994- 6309-2020-22.3-59-68. (In Russian). ______ * Corresponding author Novikov Vladislav V. , Ph.D. (Engineering), Associate Professor Tver State Technical University, 22 Af. Nikitin Emb., 170026, Tver, Russian Federation Tel.: 8 (482) 278-88-80, e-mail: vnvkv@yandex.ru