Formation of metastable phases during spark plasma sintering of Fe@Au core–shell particles Full article
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Philosophical Magazine
ISSN: 1478-6435 |
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| Output data | Year: 2024, Pages: 1-17 Pages count : 17 DOI: 10.1080/14786435.2024.2352015 | ||||
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Abstract:
The present work reports the formation of Fe-Au metastable alloys by galvanic replacement, pressureless spark plasma sintering (SPS) and acid treatment. The reaction of partial galvanic replacement between micrometer-sized iron particles and HAuCl4 solution allowed synthesising core–shell Fe@Au particles. When the Fe@Au particles were treated in HCl solution, iron was selectively dissolved and hollow Au particles were formed. Pressureless SPS of the Fe@Au core–shell particles led to the formation of a metastable intermetallic phase, FeAu3, and a supersaturated solid solution, Au(Fe). The latter was resistant to HCl solution; at the same time, the FeAu3 phase decomposed during HCl treatment to form a porous gold structure. This work shows that a combination of galvanic replacement, SPS and acid treatment can be used for the preparation of metastable Fe-Au alloys with different phase compositions and particle morphologies.
Cite:
Bokhonov B.B.
, Sharafutdinov M.R.
, Dudina D.V.
Formation of metastable phases during spark plasma sintering of Fe@Au core–shell particles
Philosophical Magazine. 2024. P.1-17. DOI: 10.1080/14786435.2024.2352015 WOS Scopus РИНЦ OpenAlex
Formation of metastable phases during spark plasma sintering of Fe@Au core–shell particles
Philosophical Magazine. 2024. P.1-17. DOI: 10.1080/14786435.2024.2352015 WOS Scopus РИНЦ OpenAlex
Dates:
| Submitted: | Feb 26, 2024 |
| Published online: | May 15, 2024 |
Identifiers:
| Web of science: | WOS:001223877300001 |
| Scopus: | 2-s2.0-85193064738 |
| Elibrary: | 67874029 |
| OpenAlex: | W4396925508 |