Elastic moduli of η-Ta2N3, a tough self-healing material, via laser ultrasonics - Archive ouverte HAL
Article Dans Une Revue physica status solidi (RRL) - Rapid Research Letters Année : 2012

Elastic moduli of η-Ta2N3, a tough self-healing material, via laser ultrasonics

Résumé

The elastic moduli of the dense polycrystalline oxygen-bearing η-Ta2N3, a novel hard and tough high-pressure (HP) material, were measured using the laser ultrasonic technique. The bulk modulus was determined to be B0 = 281(15) GPa which is only ∼11% below that from HP compression measurements. Our value of the shear modulus G0 = 123(2) GPa is below those ones predicted theoretically for model structures. The discrepancies in G0 could be due to a substitution of an- ions and the formation of cation vacancies in η-Ta2N3. Self-healing behaviour of η-Ta2N3 by mechanical polishing was observed and confirmed by two independent experimental methods.

Dates et versions

hal-03867468 , version 1 (23-11-2022)

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Citer

Andreas Zerr, Nikolay Chigarev, Ovidiu Brinza, Sergey Nikitin, Alexey Lomonosov, et al.. Elastic moduli of η-Ta2N3, a tough self-healing material, via laser ultrasonics. physica status solidi (RRL) - Rapid Research Letters, 2012, 6 (12), pp.484-486. ⟨10.1002/pssr.201206419⟩. ⟨hal-03867468⟩
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