Studying tribotechnical characteristics of plasma electrical insulating coatings
| Authors: Zaitsev A.N., Maksimov V.A. | Published: 11.09.2013 |
| Published in issue: #3(92)/2013 | |
| Category: Inspection and Diagnostics | |
| Keywords: plasma electrical insulation coatings, tribology, blanket of International Thermonuclear Experimental Reactor (ITER) | |
The results ofstudying properties of the ceramic coatings: aluminum oxide, aluminum oxide with 13 % of titanium, and magnesium aluminum spinel (obtained using the method for plasma spraying on the substrates made of the alloy Inconel 718 and the steel 316L(N)) are given. The tribological tests of the plasma coatings have been conducted within a speed range from 0.75 to 6 m/min under pressures of 6.3 and 7MPa without greasing in pair with the alloy Inconel 718 and the steel 316L(N). The factors effecting the variation in characteristics of these materials with friction and wear are considered. The plasma coatings with high hardness are brittle enough, the abrasive wear of these coatings under conditions of dry friction is typically revealed in the form of inhomogeneous separation of the coating material particles. The pair of Inconel 718-aluminum oxide + 13% dioxide titanium possesses the highest wear resistance as compared to other pairs, which also correlates with a low friction factor.
References
[1] Trester P.W., McKelvey T.E., Doll D.W., Sevier D.L., Ulrickson M.A. Selection and qualification of materials for relative motion and electrical isolation in a vacuum environment. Thin Solid Films, 1984, vol. 119, pp. 113-120.
[2] Nosovskiy I.G. The study of friction and wear processes for certain diffusion and detonation coatings in vacuum. Trenie i iznos [Frict. Wear], 1983, vol. 4, no. 5, pp. 796-800 (in Russ.).
[3] Puzryakov A.F Teoreticheskie osnovy tekhnologii plazmennogo napyleniya: ucheb. posobie po kursu "Tekhnologiya konstruktsiy iz metallokompozitov" [Theoretical foundations of plasma spray technology: textbook for the course "Technology of metallic composite structures"]. Moscow, MGTU im.N.E. Baumana Publ., 2008. 360 p.
[4] Zatz I.J. Dynamic analysis of the TFTR bumper limiter. Nucl. Eng. Des., 1987, vol. 4, pp. 141-148.
[5] Kragel’skiy I.V Trenie i iznos [Friction and wear]. Moscow, Mashinostroenie Publ., 1968. 358 p.
[6] Lee S.W., Hsu S.H., Shen M.C. Ceramic wear maps: zirconia. J. Amer. Ceram. Soc., 1993, vol. 76, no. 8, pp. 1937-1947.
[7] Becker P.C., Libsch T.A., Rhee S.K. Wear mechanisms of toughening zirconias. Ceram. Eng. Sci. Proc., 1985, no. 7, pp. 1040-1058.
