Sökning: onr:"swepub:oai:DiVA.org:ltu-72953" >
A high-entropy B4(H...
-
Zhang, Hanzhu,1991-Luleå tekniska universitet,Materialvetenskap
(författare)
A high-entropy B4(HfMo2TaTi)C and SiC ceramic composite
- Artikel/kapitelEngelska2019
Förlag, utgivningsår, omfång ...
-
Royal Society of Medicine Press,2019
-
printrdacarrier
Nummerbeteckningar
-
LIBRIS-ID:oai:DiVA.org:ltu-72953
-
https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-72953URI
-
https://doi.org/10.1039/C8DT04555KDOI
Kompletterande språkuppgifter
-
Språk:engelska
-
Sammanfattning på:engelska
Ingår i deldatabas
Klassifikation
-
Ämneskategori:ref swepub-contenttype
-
Ämneskategori:art swepub-publicationtype
Anmärkningar
-
Validerad;2019;Nivå 2;2019-08-20 (johcin);For correction, see: Dalton Trans., 2019,48, 6647-6647. DOI:10.1039/C9DT90099C
-
A multicomponent composite of refractory carbides, B4C, HfC, Mo2C, TaC, TiC and SiC, of rhombohedral, face-centered cubic (FCC) and hexagonal crystal structures is reported to form a single phase B4(HfMo2TaTi)C ceramic with SiC. The independent diffusion of the metal and nonmetal atoms led to a unique hexagonal lattice structure of the B4(HfMo2TaTi)C ceramic with alternating layers of metal atoms and C/B atoms. In addition, the classical differences in the crystal structures and lattice parameters among the utilized carbides were overcome. Electron microscopy, X-ray diffraction and calculations using density functional theory (DFT) confirmed the formation of a single phase B4(HfMo2TaTi)C ceramic with a hexagonal close-packed (HCP) crystal structure. The DFT based crystal structure prediction suggests that the metal atoms of Hf, Mo, Ta and Ti are distributed on the (0001) plane in the HCP lattice, while the carbon/boron atoms form hexagonal 2D grids on the (0002) plane in the HCP unit cell. The nanoindentation of the high-entropy phase showed hardness values of 35 GPa compared to the theoretical hardness value estimated based on the rule of mixtures (23 GPa). The higher hardness was contributed by the solid solution strengthening effect in the multicomponent hexagonal structure. The addition of SiC as the secondary phase in the sintered material tailored the microstructure of the composite and offered oxidation resistance to the high-entropy ceramic composite at high temperatures.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
-
Hedman, Daniel,1989-Luleå tekniska universitet,Materialvetenskap(Swepub:ltu)danhed
(författare)
-
Feng, PeizhongChina University of Mining and Technology
(författare)
-
Han, GangUniversity of Science and Technology Beijing
(författare)
-
Akhtar, FaridLuleå tekniska universitet,Materialvetenskap(Swepub:ltu)farakh
(författare)
-
Luleå tekniska universitetMaterialvetenskap
(creator_code:org_t)
Sammanhörande titlar
-
Ingår i:Dalton Transactions: Royal Society of Medicine Press48:16, s. 5161-51671477-92261477-9234
Internetlänk
Hitta via bibliotek
Till lärosätets databas