Orientation-dependent mechanical behavior and phase transformation of mono-crystalline silicon

2016 ◽  
Vol 119 (9) ◽  
pp. 095904 ◽  
Author(s):  
Jiapeng Sun ◽  
Aibin Ma ◽  
Jinghua Jiang ◽  
Jing Han ◽  
Ying Han
Keyword(s):  
Phase Transformation ◽  
Mechanical Behavior ◽  
Crystalline Silicon

scholarly journals Pressure-induced amorphization in the nanoindentation of single crystalline silicon

RSC Advances ◽  
2017 ◽  
Vol 7 (3) ◽  
pp. 1357-1362 ◽  
Author(s):  
Jing Han ◽  
Song Xu ◽  
Jiapeng Sun ◽  
Liang Fang ◽  
Hua Zhu
Keyword(s):  
Molecular Dynamics ◽  
Phase Transformation ◽  
Mechanical Behavior ◽  
Molecular Dynamics Simulations ◽  
Silicon Surface ◽  
Large Scale ◽  
Crystalline Silicon ◽  
Single Crystalline Silicon ◽  
Single Crystalline ◽  
Dynamics Simulations

Large-scale molecular dynamics simulations of nanoindentation on a (100) oriented silicon surface were performed to investigate the mechanical behavior and phase transformation of single crystalline silicon.

The phase transformation and mechanical behavior of NiTi thin films

2004 ◽  
Author(s):  
Zhenyu Yuan ◽  
Xiulan Cheng ◽  
Dong Xu ◽  
Zhican Ye ◽  
YaFei Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Transformation ◽  
Mechanical Behavior

Fracture Characteristic of Single Crystalline Silicon Using Nano-Indentation and Finite Element Analysis

2006 ◽  
Vol 306-308 ◽  
pp. 601-606
Author(s):  
Seung Baek ◽  
Jae Mean Koo ◽  
Chang Sung Seok
Keyword(s):  
Fracture Toughness ◽  
Finite Element ◽  
Phase Transformation ◽  
Crystalline Silicon ◽  
Indentation Test ◽  
Indentation Load ◽  
Single Crystalline Silicon ◽  
Element Analysis ◽  
Single Crystalline ◽  
Nano Indentation

Nano-indentation test is used widely to determine the fracture toughness of brittle materials and to provide information on important material properties such as the Young’s modulus and hardness. In this study, using nano-indentation testing, atomic force microscope (AFM), and finite element method (FEM), we performed the indentation fracture toughness and fracture strength measurement for a (100) single crystalline silicon at different load states. In addition, the loads of the phase transformation events during unloading were estimated by the load-depth curves. The phase transformation load and micro-crack propagation events at pop-out during the unloading process depended on the maximum applied indentation load.

scholarly journals Molecular Dynamics Simulations of Nanoparticle-Surface Collisions in Crystalline Silicon

2008 ◽  
Vol 1 ◽  
pp. 31-39 ◽  
Author(s):  
Paolo Valentini ◽  
Traian Dumitrica
Keyword(s):  
Molecular Dynamics ◽  
Phase Transformation ◽  
Crystalline Silicon ◽  
Low Energy ◽  
Coherent Phonon ◽  
Soft Landing ◽  
Microscopic Description ◽  
Nanoparticle Surface ◽  
Deformation Regime ◽  
Dynamics Simulations

We present a microscopic description for the impacting process of silicon nanospheres onto a silicon substrate. In spite of the relatively low energy regime considered (up to 1 eV/atom), the impacting process exhibits a rich behavior: A rigid Hertzian model is valid for speeds below 500 m/s, while a quasi-ellipsoidal deformation regime emerges at larger speeds. Furthermore, for speeds up to 1000 m/s the particle undergoes a soft landing and creates a long-lived coherent surface phonon. Higher speeds lead to a rapid attenuation of the coherent phonon due to a partial diamond cubic to-tin phase transformation occurring in the particle.

scholarly journals Polishing of Ground Y-TZP Ceramic is Mandatory for Improving the Mechanical Behavior

2018 ◽  
Vol 29 (5) ◽  
pp. 483-491 ◽  
Author(s):  
Camila Pauleski Zucuni ◽  
Luis Felipe Guilardi ◽  
Marilia Pivetta Rippe ◽  
Gabriel Kalil Rocha Pereira ◽  
Luiz Felipe Valandro
Keyword(s):  
Heat Treatment ◽  
Phase Transformation ◽  
Mechanical Behavior ◽  
Structural Reliability ◽  
Mechanical Performance ◽  
Tetragonal Zirconia ◽  
Surface Treatments ◽  
Phase Content ◽  
Characteristic Strength ◽  
M Phase

Abstract It evaluated the effect of aging by Low Temperature Degradation (LTD), executed after post- processing surface treatments (polishing, heat treatment and glazing), on the surface characteristics (micromorphology and roughness) and on the structural stability (phase transformation and mechanical behavior-flexural strength and structural reliability) of a ground yttrium-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramic. Discs of Y-TZP (VITA In-Ceram YZ) were manufactured (ISO:6872-2015; 15 mm in diameter and 1.2 ± 0.2 mm in thickness) and randomly assigned into 10 groups according two factors: “aging” in 2 levels (with or without) and “surface treatment” in 5 levels (Ctrl: as-sintered; Gr: grinding with coarse diamond bur; Gr + HT: grinding plus heat treatment; Gr + Pol: grinding plus polishing; Gr + Gl: grinding plus glazing). Roughness (n=30), biaxial flexural test (n=30), phase transformation (n=2), and surface topography (n=2) analyses were performed. Aging led to an intense increase in monoclinic (m) phase content for all the tested conditions, being the as-sintered samples (Ctrl= 65.6%) more susceptible to the t-m phase transformation. Despite of increasing the m-phase content, aging was not detrimental for characteristic strength (except to the grinding condition). There was no significant reduction in the Weibull modulus after surface treatments. Additionally, heat treatment and glazing after grinding led to a decrease in characteristic strength, while polishing presented the highest characteristic strength values. Thus, polishing is mandatory after grinding the Y-TZP ceramic, while performing glazing or heat-treatment alone after grinding lead to the worst mechanical performance.

Sign in / Sign up

Export Citation Format

Share Document