Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. Founded at 2009

Change in properties of diffusion-hardening composite solder when modified with stainless steel powder

V.M. Skachkov, S.A. Bibanaeva, N.A. Sabirzyanov

Institute of Solid State Chemistry of the Ural Branch of RAS

DOI: 10.26456/pcascnn/2026.18.XXX

Original article

Abstract: The article discusses changes in the structure and microhardness of diffusion-hardening solder based on low-melting alloy gallium (68%) -indium (23,5%) -tin (8,5%) and a solid component from copper-tin alloy powder (5%) depending on the dosage of stainless steel powder. Stainless steel powder was added in an amount of 5, 10, 15, 20% by weight, solder samples were heat treated at temperatures of 125 and 600°C, and compared with a base solder composition of 30% by weight of gallium-indium-tin alloy and 70% by weight of copper-tin alloy powder. The X-ray phase analysis method determines the phases formed as a result of the interaction of solder components under different heat treatment modes. The method of differential thermal analysis revealed thermal effects in the formation of solid solutions and intermetallic compounds of gallium with transition metals in the temperature range of 17-600°C. It has been shown that thermal treatment at temperatures above 450°C promotes the transition of the solder to an equilibrium state, which leads to an increase in hardness, in particular, due to the uniform distribution of nanoscale inclusions. Scanning electron microscopy revealed that stainless steel has limited solubility in the composition of diffusion-hardening solder, but after high-temperature treatment (600°C) reduces its hardness due to violation of the composition of the gallium-copper solid solution.

Keywords: composite diffusion-hardening solders, metal powder, properties, microhardness, differential thermal analysis

  • Vladimir M. Skachkov – Ph. D., Senior Researcher, Laboratories of heterogeneous processes chemistry, Institute of Solid State Chemistry of the Ural Branch of RAS, ORCID: 0000-0003-2551-3235
  • Svetlana A. Bibanaeva – Researcher, Laboratories of heterogeneous processes chemistry, Institute of Solid State Chemistry of the Ural Branch of RAS, ORCID: 0000-0002-1181-8735
  • Nail A. Sabirzyanov – Dr. Sc., Chief Researcher Laboratories of heterogeneous processes chemistry, Institute of Solid State Chemistry of the Ural Branch of RAS, ORCID: 0000-0002-0304-8160

For citation:

Skachkov V.M., Bibanaeva S.A., Sabirzyanov N.A. Izmenenie svojstv diffuzionno-tverdeyushchego kompozitsionnogo pripoya pri modifikatsii poroshkom iz nerzhaveyushchej stali [Change in properties of diffusion-hardening composite solder when modified with stainless steel powder], Fiziko-khimicheskie aspekty izucheniya klasterov, nanostruktur i nanomaterialov [Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials], 2026, issue 18, pp. __-__. DOI: 10.26456/pcascnn/2026.18.XXX. ⎘

Full article (in Russian): download PDF file

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