Crystal morphology of the compound TiB2

Abdel-Hamid, Ahmed A.; Hamar‐Thibault, S.; Hamar, Roman

doi:10.1016/0022-0248(85)90386-0

Cited by 60 publications

(19 citation statements)

References 6 publications

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“…Hexahedral prism TiB 2 is observed, which is in agreement with the results in Ref. [9]. It can be deduced that flaky TiB 2 is composed of lots of fine bar crystals from the magnified SEM photograph of flaky TiB 2 (Fig.…”

Section: Methodssupporting

confidence: 91%

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Microstructural characteristics of Ti–45Al–8.5Nb/TiB2 composites by powder metallurgy

Wang

Lin

et al. 2009

Journal of Alloys and Compounds

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Section: Methodssupporting

confidence: 91%

“…The boride exists in different morphologies, which depends on boron volume fraction and other factors [9,13,14]. TiB 2 mostly exists in particulate or bar when its volume fraction is lower than 0.8%.…”

Section: Formation Of Tib 2 Reinforcementmentioning

confidence: 99%

Microstructural characteristics of Ti–45Al–8.5Nb/TiB2 composites by powder metallurgy

Wang

Lin

et al. 2009

Journal of Alloys and Compounds

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“…Using this equation, a value of −0.46 eV/atom was obtained for the formation enthalpy of the compound ferromagnetic state. This negative value means that it is possible to synthesise this compound experimentally compared with the stability of the other compounds as TiNi, NiB and TiB compounds as possible [34][35][36][37][38][39].…”

Section: Resultsmentioning

confidence: 99%

Half-Metallic Properties in the New Ti2NiB Heusler Alloy

Hussain

Gao

Yao

2015

J Supercond Nov Magn

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The electronic structure and magnetic properties of the new Ti 2 NiB Heusler alloy, which has a highordered CuHg 2 Ti structure, were examined using the selfconsistent full-potential linearised augmented plane wave method within density functional theory. Analysis of the electronic band structures and state densities of the Ti2NiB full-Heusler compound revealed that whereas the spin-up electrons are metallic, the spin-down bands are characterised by a gap of 0.62 eV, resulting in stable half-metallic ferromagnetism with a magnetic moment of 3 μ B /f.u. The total magnetic moment (M t ) and number of valence electrons (Z t ) in the Ti2NiB compound were found to obey the Slater-Pauling (SP) rule of M t = Z t − 18. Due to their different surroundings, the magnetic moments of Ti (1) and Ti (2) exhibit distinct differences, with the magnetic contribution of Ti (1) slightly larger than that of Ti (2). A negative formation enthalpy value was also obtained, thus encouraging the experimental manufacture of the alloy. The band gap was elucidated to be mainly determined by the bonding and antibonding states created from the hybridisations of the d states between the Ti (1)-Ti (2) coupling and the Ni atom. Finally, the Ti2NiB compound was found to maintain 100 % polarisation at the Fermi level, with the half-metallic character present for lattice constants ranging from 5.60 to 6.50Å, thus making the alloy favourable for practical applications.

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“…It is also found that content of borides increases with the increase of hot pressing temperature. For the studied alloys, the crystal structure of the particulate and acicular borides is not known yet, but from the hexahedral prism appearance of the particles it can be concluded that the boride phase is TiB 2 [16]. Therefore, it is thought that TiB 2 forms via the solid-solid reaction in situ between Ti powder and B powder, namely, Ti(s) + 2B(s) → TiB 2 (s).…”

Section: Effect Of Hot Pressing Process On Microstructurementioning

confidence: 95%