Morphology of pores and interfaces and mechanical behavior of nanocluster-assembled silicon nitride ceramic

Rajiv K. Kalia, Aiichiro Nakano, Kenji Tsuruta, Priya Vashishta

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Million atom molecular-dynamics simulations are performed to investigate the structure, dynamics, and mechanical behavior of cluster-assembled Si3N4 These solids contain highly disordered interfacial regions with 50% undercoordinated atoms. Systems sintered at low pressures have percolating pores whose surface morphologies are well characterized by two values of the roughness exponent, 0.46 and 0.86; these are close to the experimental values found by Bouchaud et al. for fracture surfaces. Results for elastic moduli are consistent with a three-phase model for heterogeneous materials.

Original languageEnglish
Pages (from-to)689-692
Number of pages4
JournalPhysical Review Letters
Volume78
Issue number4
Publication statusPublished - 1997
Externally publishedYes

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nanoclusters
silicon nitrides
ceramics
porosity
atoms
modulus of elasticity
roughness
low pressure
exponents
molecular dynamics
simulation

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Morphology of pores and interfaces and mechanical behavior of nanocluster-assembled silicon nitride ceramic. / Kalia, Rajiv K.; Nakano, Aiichiro; Tsuruta, Kenji; Vashishta, Priya.

In: Physical Review Letters, Vol. 78, No. 4, 1997, p. 689-692.

Research output: Contribution to journalArticle

Kalia, Rajiv K. ; Nakano, Aiichiro ; Tsuruta, Kenji ; Vashishta, Priya. / Morphology of pores and interfaces and mechanical behavior of nanocluster-assembled silicon nitride ceramic. In: Physical Review Letters. 1997 ; Vol. 78, No. 4. pp. 689-692.
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