Properties of diffusion-hardening composite solder modified with tungsten powders
V.M. Skachkov, L.A. Pasechnik, I.S. Medyankina, N.A. Sabirzyanov
The Institute of Solid State Chemistry of the Ural Branch of RAS
DOI: 10.26456/pcascnn/2022.14.707
Original article
Abstract: The article considers the regulation of the properties of diffusion-hardening solder based on a low-melting gallium-tin-zinc alloy and copper-tin alloy powder by introducing inert tungsten metal powders. After heat treatment at low temperatures (125°C), the microhardness of composite diffusion-hardening solders with a tungsten content of 5, 10, 15 and 20% is estimated. It is shown that the heat treatment at low temperatures for 6 hours does not lead the solder to reach an equilibrium state, physico-chemical transformations are still ongoing, which shows an increase in the hardness of the samples after two months. The X–ray phase analysis has been used to determine the phases formed as a result of the diffusion hardening: micro- and nanoscale intermetallic compounds and metallic tin in the form of nanoscale inclusions in the space between the grains of copper alloy powder. Due to small additions of tungsten as a filler, inert to the effects of gallium, but well wetted by it, the characteristics of diffusion-hardening solder are improved. Judging by the microhardness, the introduction of 15% tungsten is optimal.
Keywords: composite diffusion-hardening solders, metal powder, properties, tungsten, microhardness, differential thermal analysis
- Vladimir M. Skachkov – Ph. D., Senior Researcher, Laboratory of Heterogeneous Processes, The Institute of Solid State Chemistry of the Ural Branch of RAS
- Liliya A. Pasechnik – Ph. D., Leading Researcher, Laboratory of Heterogeneous Processes, The Institute of Solid State Chemistry of the Ural Branch of RAS
- Irina S. Medyankina – postgraduate student, Junior Researcher, Laboratory of Heterogeneous Processes, The Institute of Solid State Chemistry of the Ural Branch of RAS
- Nail A. Sabirzyanov – Dr. Tc., chief Scientific Officer, Laboratory of Heterogeneous Processes, The Institute of Solid State Chemistry of the Ural Branch of RAS
Reference:
Skachkov, V.M. Properties of diffusion-hardening composite solder modified with tungsten powders / V.M. Skachkov, L.A. Pasechnik, I.S. Medyankina, N.A. Sabirzyanov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2022. — I. 14. — P. 707-716. DOI: 10.26456/pcascnn/2022.14.707. (In Russian).
Full article (in Russian): download PDF file
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