Changing the properties of diffusion-hardening solders hardened with titanium, zirconium, and hafnium 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/2023.15.831
Original article
Abstract: This article presents the results of a study of the properties of three diffusion-hardening solders based on low-melting gallium alloys and copper-tin alloy powder after the introduction of inert metal powders of titanium, zirconium, and hafnium in an amount of 5% each, which is an additive of 15 wt.%. After heat treatment at low temperatures (125°C) in within 24 hours, and after hightemperature treatment (600°C) for 6 hours, the microhardness of the obtained composite diffusionhardening solders was evaluated. Relatively long-term heat treatment at low temperatures does not lead the composition to achieve equilibrium states, possible physico-chemical transformations do not fully occur in them, which shows an increase in the hardness of samples after high-temperature treatment. X-ray phase analysis has determined the phases formed as a result of diffusion hardening, forming micro- and nanoscale intermetallic compounds, and the metal tin released in the form of nanoscale secretions in the intergrain space. Metal filler powders, inert at low temperature to exposure, but well wetted with gallium at high temperatures, interact with it, forming nanoscale intermetallic compounds, additionally strengthening composite solders.
Keywords: composite diffusion-hardening solders, metal powder, titanium, zirconium, hafnium, properties, 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 – Researcher, Laboratory of Heterogeneous Processes, The Institute of Solid State Chemistry of the Ural Branch of RAS
- Nail A. Sabirzyanov – Dr. Sc., Chief Scientific Researcher, Laboratory of Heterogeneous Processes, The Institute of Solid State Chemistry of the Ural Branch of RAS
Reference:
Skachkov, V.M. Changing the properties of diffusion-hardening solders hardened with titanium, zirconium, and hafnium 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. — 2023. — I. 15. — P. 831-839. DOI: 10.26456/pcascnn/2023.15.831. (In Russian).
Full article (in Russian): download PDF file
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