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Control of Nickel Layer on Metallized Ceramics

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The effect of the thickness and chemical composition of the nickel surface on the vacuum density of articles made of VK94 ceramic after soldering with PSr72 solder was studied. It was found that for nickel layer thickness < 3 μm elemental oxides (aluminum, silicon, manganese, molybdenum), which are part of the metallization, are present in its surface. The existing methods of controlling the nickel layer by means of attendant samples do not guarantee surface quality in large batches of articles. A non-destructive method of controlling the thickness of the nickel directly on the articles is proposed. The efficiency of the method makes it possible to check 100% of the articles directly in production. The method is based on measuring the thermo-EMF, which GOST 9.302–88 provides for checking the thickness of galvanic coatings. The method is used at a number of enterprises producing metallized ceramic.

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References

  1. D. V. Deryabin, E. A. Alimova, G. A. Smirnov, et al., “Quality of the metallization layer of the ceramics VK94, VK9,” Nadezh. Kach-vo Slozh. Sistem, No. 2, 55 (2018).

  2. GOST 9.302–88 (ISO 1463–82, ISO 2064–80, ISO 2106–82). Unified System of Protection Against Corrosion and Aging (ESZKS). Metallic and Non-Metallic Inorganic Coatings. Control Methods (with Amendment) [in Russian], Izd. Standartov, Moscow (1990).

  3. M. G. Smirnov, D.M. Emelin, and G. A. Smirnov, “Thermo-EMF of commercial steels and alloys,” Metallovedenie i Termicheskaya Obrabotka Metallov, No. 4, 54 – 55 (2014).

  4. “TAMIS – Thermoelectric analyzer for metals and alloys,” Kontrol’, Diagnostika, No. 3, 37 (2017).

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Authors and Affiliations

  1. Scientific Research Institute of Electronic and Mechanical Devices (NIIEMP JSC), Penza, Russia

    G. A. Smirnov

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  1. G. A. Smirnov
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Correspondence to G. A. Smirnov.

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Translated from Steklo i Keramika, No. 5, pp. 9 – 13, May, 2021.

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Smirnov, G.A. Control of Nickel Layer on Metallized Ceramics. Glass Ceram 78, 180–183 (2021). https://doi.org/10.1007/s10717-021-00374-0

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  • DOI: https://doi.org/10.1007/s10717-021-00374-0

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