Next Article in Journal
Investigation on Ambipolar Current Suppression Using a Stacked Gate in an L-shaped Tunnel Field-Effect Transistor
Previous Article in Journal
Elaboration of the Demulsification Process of W/O Emulsion with Three-Dimensional Electric Spiral Plate-Type Microchannel
Open AccessArticle

The Indentation-Induced Pop-in Phenomenon and Fracture Behaviors of GaP(100) Single-Crystal

1
School of Mechanical and Automotive Engineering, Xiamen University of Technology, Xiamen 361024, China
2
Department of Materials Science and Engineering, I-Shou University, Kaohsiung 840, Taiwan
3
Department of Materials Engineering, Ming Chi University of Technology, New Taipei City 243, Taiwan
4
Center for Plasma and Thin Film Technologies, Ming Chi University of Technology, New Taipei City 24301, Taiwan
5
Department of Mechanical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
6
Department of Electrophysics, National Chiao Tung University, Hsinchu 300, Taiwan
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(11), 752; https://doi.org/10.3390/mi10110752
Received: 26 September 2019 / Revised: 31 October 2019 / Accepted: 31 October 2019 / Published: 2 November 2019
The deformation behaviors and fracture features of GaP(100) single-crystal are investigated by using nano- and micro-scale indentation techniques. The hardness and Young’s modulus were measured by nanoindentation using a Berkovich diamond indenter with continuous contact stiffness measurements (CSM) mode and the values obtained were 12.5 ± 1.2 GPa and 152.6 ± 12.8 GPa, respectively. In addition, the characteristic “pop-in” was observed in the loading portion of load-displacement curve, which was caused by the nucleation and/or propagation of dislocations. An energetic estimation methodology on the associated nanoindentation-induced dislocation numbers resulting from the pop-in events was discussed. Furthermore, the Vickers indentation induced fracture patterns of GaP(100) single-crystal were observed and analyzed using optical microscopy. The obtained fracture toughness KC of GaP(100) single-crystal was ~1.7 ± 0.1 MPa·m1/2, which is substantially higher than the KIC values of 0.8 MPa·m1/2 and 1.0 MPa·m1/2 previously reported for of single-crystal and polycrystalline GaP, respectively. View Full-Text
Keywords: GaP(100) single crystal; pop-in; nanoindentation; fracture GaP(100) single crystal; pop-in; nanoindentation; fracture
Show Figures

Figure 1

MDPI and ACS Style

Chiu, Y.-J.; Jian, S.-R.; Lee, J.-W.; Juang, J.-Y. The Indentation-Induced Pop-in Phenomenon and Fracture Behaviors of GaP(100) Single-Crystal. Micromachines 2019, 10, 752.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop