Ceramic Matrix Composites Prepared from CoAl Powders Full article
| Journal |
Journal of Materials Science
ISSN: 0022-2461 , E-ISSN: 1573-4803 |
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| Output data | Year: 2016, Volume: 51, Number: 23, Pages: 10487-10498 Pages count : 12 DOI: 10.1007/s10853-016-0268-y | ||||
| Tags | Alumina; Aluminum alloys; Calcination; Catalyst activity; Ceramic matrix composites; Cermets; Cobalt; Cobalt deposits; Mechanical alloying; Metals; Microwave heating; Powder metals; Powders | ||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Federal Agency for Scientific Organizations | V.45.3.8. |
| 2 | Russian Foundation for Basic Research | 14-08-00251 |
Abstract:
Multiscale structure of two CoxAlyOz cermets was examined by a combination of XRD, SEM coupled with EDX, NMR (59Co; 27Al), and textural measurements. A strong CoAlO/CoAl cermet monolith prepared by mechanical alloying of Co and Al powders followed by hydrothermal treatment and calcination in air comprised two parts: the metal core consisting of Co and a Co–Al alloy, and the outer oxide matrix including a mixture of CoxAl3–xO4 spinel and cobalt oxides. The two parts were separated by the alumina interface protecting the metal core against the oxidation. Al2O3/CoAlO/CoAl cermet prepared by mixing the Co–Al mechanically alloyed product and pure aluminum hydroxide with subsequent hydrothermal treatment and calcination in air consisted of three main parts: (i) large cobalt-free porous alumina (ii) surrounded by CoxAl3–xO4 spinel oxides, and (iii) the inner core containing pure Co metal particles covered with the Co–Al alloy. A random distribution of metal particles in the oxide matrix provided an enhanced microwave absorption. A developed porosity ensured a high activity of the catalyst prepared from the porous cermet in the hexane dehydrogenation under microwave heating.
Cite:
Tikhov S.F.
, Andreev A.S.
, Salanov A.N.
, Cherepanova S.V.
, Lapina O.B.
, Sadykov V.A.
, Tanashev Y.Y.
, Bolotov V.A.
Ceramic Matrix Composites Prepared from CoAl Powders
Journal of Materials Science. 2016. V.51. N23. P.10487-10498. DOI: 10.1007/s10853-016-0268-y WOS Scopus РИНЦ ANCAN OpenAlex
Ceramic Matrix Composites Prepared from CoAl Powders
Journal of Materials Science. 2016. V.51. N23. P.10487-10498. DOI: 10.1007/s10853-016-0268-y WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Apr 25, 2016 |
| Accepted: | Jul 28, 2016 |
| Published online: | Aug 5, 2016 |
| Published print: | Dec 1, 2016 |
Identifiers:
| Web of science: | WOS:000383102400015 |
| Scopus: | 2-s2.0-84982993390 |
| Elibrary: | 28486877 |
| Chemical Abstracts: | 2016:1296939 |
| Chemical Abstracts (print): | 165:345942 |
| OpenAlex: | W2505012996 |