Room temperature strain rate sensitivity in precursor derived HfO2/Si-C-N(O) ceramic nanocomposites | Zendy

Ravindran Sujith | Zendy; Ravi Kumar | Zendy

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Room temperature strain rate sensitivity in precursor derived HfO2/Si-C-N(O) ceramic nanocomposites

Author(s) -

Ravindran Sujith,

Ravi Kumar

Publication year - 2014

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4863537

Subject(s) - materials science , ceramic , nanoindentation , nanocomposite , strain rate , sensitivity (control systems) , sintering , strain (injury) , composite material , amorphous solid , analytical chemistry (journal) , crystallography , electronic engineering , chemistry , medicine , chromatography , engineering

Investigation on the room temperature strain rate sensitivity using depth sensing nanoindentation is carried out on precursor derived HfO2/Si-C-N(O) ceramic nanocomposite sintered using pulsed electric current sintering. Using constant load method the strain rate sensitivity values are estimated. Lower strain rate sensitivity of ∼ 3.7 × 10−3 is observed and the limited strain rate sensitivity of these ceramic nanocomposites is explained in terms of cluster model. It is concluded that presence of amorphous Si-C-N(O) clusters are responsible for the limited flowability in these ceramics

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