Nano-scaled diffusional or dislocation creep analysis of single-crystal ZnO | Zendy

P.H. Lin | Zendy; X.H. Du | Zendy; YiRu Chen | Zendy; H. C. Chen | Zendy; J.C. Huang | Zendy

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Nano-scaled diffusional or dislocation creep analysis of single-crystal ZnO

Author(s) -

P.H. Lin,

X.H. Du,

YiRu Chen,

H. C. Chen,

J.C. Huang

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4964357

Subject(s) - creep , nanoindentation , materials science , dislocation , dislocation creep , diffusion creep , indentation , composite material , stress (linguistics) , diffusion , crystal (programming language) , single crystal , plane (geometry) , crystallography , condensed matter physics , thermodynamics , grain boundary , geometry , microstructure , chemistry , physics , linguistics , philosophy , mathematics , computer science , programming language

The nanoindentation time-dependent creep experiments with different peak loads are conducted on c-plane (0001), a-plane (112¯0) and m-plane (101¯0) of single-crystal ZnO. Under nano-scaled indentation, the creep behavior is crystalline orientation-dependent. For the creep on (0001), the stress exponent at low loads is ∼1 and at high loads ∼4. The stress exponents under all loads are within 3∼7 for the creep on (112¯0) and (101¯0). This means that diffusion mechanism and dislocation mechanism is operative for different planes and loads. The relative difficulty of dislocations activation is an additional factor leading to the occurring of diffusion creep on the c-plane of single-crystal ZnO

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