Preparation and characterization of spherical niobium silicide-based powder particles by electrode induction gas atomization

• Published in: Materials letters 2019-05, Vol.243, p.5-8
• Main Authors: Park, Jong Min, Na, Tae-Wook, Park, Hyung-Ki, Yang, Seung-Min, Kang, Jang-Won, Lee, Taeg Woo
• Format: Article
• Language: English
• Subjects: Alloy powders; Atomizing; Electric arc melting; Electrode induction gas atomization; Electrodes; Gas atomization; Grain size; Hafnium; Ingots; Intermetallic compounds; Materials science; Nb alloy; Niobium base alloys; Niobium-silicide-based alloy; Powder; Silicides; Solid solutions; Solution heat treatment; Spherical powders; Vacuum arc melting
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2019.01.155

•Nb-16Si-25Ti-8Hf-2Cr-2Al alloy powder was prepared.•The powder was prepared by electrode induction gas atomization.•Nb alloy ingot was prepared by vacuum arc melting and solid solution treatment.•It was composed of a (Nb, Ti) solid solution and (Nb, Ti, Hf)5Si3.•Spherical product particles were composed of an additional (Nb, Ti, Hf)3Si phase. Nb-16Si-25Ti-8Hf-2Cr-2Al alloy powder was prepared by electrode induction gas atomization (EIGA). The Nb alloy ingot, which was prepared by vacuum arc melting and was subjected to solid solution treatment, was composed of a (Nb, Ti) solid solution and (Nb, Ti, Hf)5Si3. The grain size of each phase was larger than 50 μm. The ingot was gas-atomized using the EIGA process and sieved to the range of 45–75 μm. The spherical powder particles were manufactured successfully. The powder was composed of a (Nb, Ti) solid solution, (Nb, Ti, Hf)5Si3, and (Nb, Ti, Hf)3Si, and the silicide grain size was smaller than 5 μm.