The Paton Welding Journal, 2014, №12



2014 №12 (03)

DOI of Article 10.15407/tpwj2014.12.04

2014 №12 (05)

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The Paton Welding Journal, 2014, #12, 15-18 pages  

Investigation of spraying spot and metallization pattern under conditions of microplasma spraying of coatings of titanium dioxide

Yu.S. Borisov, S.G. Vojnarovich, A.N. Kislitsa And S.N. Kalyuzhny

E.O. Paton Electric Welding Institute, NASU. 11 Bozhenko Str., 03680, Kiev, Ukraine. E-mail: office@paton.kiev.ua
 
 
Abstract
Analyzed is the gained experience in application of gas-thermal technologies in producing of electroconductive, dielectric and resistive coatings for machine building, instrument-making industry and other industry branches. It is shown that the most challenging method for formation of resistive coatings in manufacture of heating elements is a method of the plasma-arc spraying. It was found that during the process of manufacture of the resistive heating elements of small sizes (for example, for radio electronics) by using the method of traditional plasma-arc spraying the losses of material being sprayed, caused by a geometric factor, are increased. In this connection, to increase the degree of applying of sprayed materials, the technology of microplasma spraying is the mostly challenging. The work is aimed at the study of formation of a spraying spot and a metallization pattern under the conditions of microplasma spraying of the titanium dioxide coating. It was found during investigations that the spraying spot of TiO₂ has a form of ellipse with 6.0-9.2 mm sizes of axes, where the smaller axis is directed along the horizontal line, and the larger one - along the vertical line. Ratio of axes is 1.01-1.47 and depends on the spraying mode parameters. Determined are the losses of material being sprayed due to a geometric factor, which were 53% in spraying of path of 1 mm width and less than 1 % in spraying the path of 5 mm width. 19 Ref., 1 Table, 5 Figures.
 
 
Keywords: microplasma spraying, titanium dioxide, resistive heating element, metallization pattern
 
 
Received:                21.10.14
Published:               29.12.14
 
 
References
1. Vashkevich, F.F., Spalnik, A.Ya., Pluzhko, I.A. (2009) Electrothermal insulation of inductors for internal heating of tube shells. In: Building, materials science, machine building. Dnepropetrovsk: PGSA.
2. Borisov, Yu.S., Kislitsa, A.N. (2002) Microplasma spraying using wire materials. The Paton Welding J., 3, 50-51.
3. Kovalenko, G.D., Zombzhitsky, A.P. (1980) Specifics of plasma spraying of electric heating coatings with dielectric filler. Fizika i Khimiya Obrab. Materialov, 4, 86-89.
4. Lyasnikov, V.N., Perov, V.V., Lavrova, V.N. (1977) Application of plasma-arc spraying of alundum in manufacturing of cathode-heating assembly-unit. In: Electronic engineering, Series Microwave electronics, Issue 4, 85-87.
5. Baklanov, D.I., Belyajkov, I.N., Virnik, A.M. et al. Method of manufacturing of resistive heating element. Pat. 2066514 RF. Int. Cl. H 05 B 3/12. Publ. 10.09.96.
6. Scheitz, S., Toma, L., Berger, L.-M. et al. (2011) Thermisch gespritzte keramische Schichtheizelemente. Thermal Spray Bull., 4, 88-92.
7. Lyasnikov, V.K., Bogatyrev, G.F. (1978) Plasma spraying of powder materials on parts of electronic devices. In: Review on electronic engineering, Series Technology, industrial engineering and equipment, Issue 4, 62.
8. Robson, G.J. (1976) Applications of plasma spraying in hard facing. In: Proc. of Public Session and Metals Technology Conf. (Sydney), 6.5.1-6.5.12.
9. Hasui, A. (1975) Procedure of spraying. Moscow: Mashinostroenie.
10. Dostanko, A.P., Vityaz, P.A. (2001) Plasma processes in production of products of electronic engineering, Vol. 3. Minsk: FU AIN FORM.
11. Baranovsky, N.D., Sharonov, E.A., Vannovsky, V.V. (1991) Electrical properties of plasma coatings of plane heating elements. In: Proc. of Conf. on Thermal Spraying in Industry of USSR and Abroad (Leningrad, 27-29 May 1991), 60-61.
12. Griffen, L.A., Dyadechko, A.G. et al. (1990) Heating elements for fittings, produced by thermal spraying method of powders. Poroshk. Metallurgiya, 5, 102-104.
13. Ershov, A.A., Urbakh, E.K., Faleev, V.A. et al. (1995) Plasma deposition of resistive layers of strip electrical heater. In: Proc. of Conf. on Physics of Low Temperature Plasma (Petrozavodsk), Pt 3, 409-411.
14. Anshakov, A.S., Kazanov, A.M., Urbakh, E.K. (1998) Creation of low temperature heater by method of plasma spraying. Fizika i Khimiya Obrab. Materialov, 3, 56-61.
15. Smyth, R.T. (1973) Thermal spraying of fine powders. In: Proc. of 7th Int. Metal Spraying Conf. (London, 1973), 89-95.
16. Borisov, Yu.S., Pereverzev, Yu.N., Bobrik, V.G. et al. (1999) Deposition of narrow-band coatings by method of microplasma spraying. Avtomatich. Svarka, 6, 53-55.
17. Kislitsa, A.N., Kuzmich-Yanchuk, E.K., Kislitsa, N.Yu. (2009) Producing of narrow bands by microplasma spraying method from Ni-Cr wire. In: Abstr. of All-Ukr. Sci.-Techn. Conf. of Young Scientists and Specialists on Welding and Related Technologies (Kiev, 27-29 May, 2009), 94.
18. Vojnarovich, S.G. (2012) Investigation of shape and size of spraying spot and pattern of metallization under conditions of microplasma spraying of coatings from hydroxyapatite. Vestnik NUK, 3, 81-84.
19. Antsiferov, V.N., Bobrov, G.V., Druzhinin, L.K. (1987) Powder metallurgy and spraying of coatings. Ed. by B.S. Mitin. Moscow: Metallurgiya.

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Suggested Citation

Yu.S. Borisov, S.G. Vojnarovich, A.N. Kislitsa And S.N. Kalyuzhny (2014) Investigation of spraying spot and metallization pattern under conditions of microplasma spraying of coatings of titanium dioxide. The Paton Welding J., 12, 15-18.

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