Accurate extraction of $k_{\mathrm{t}}{}^{2}$ of piezoelectric film/substrate structure by conversion loss method for subtracting experimental acoustic losses in the substrate

ABSTRACTWe present a numerical model for the calculation of the temperature rise caused by pulsed laser irradiation of a thin film/substrate structure. This model includes phase changes in both the thin film and the substrate. The inclusion of phase changes results in more complex thermal behavior and significantly affects melt durations. This model was applied to the AuGe/GaAs system. Morphological observation using the scanning electron microscope and SIMS profiles provides experimental verification for the numerical calculations.

Download Full-text

Monte Carlo Study of X-ray Generation from Film/Substrate Structure by Electron Impact

Japanese Journal of Applied Physics ◽

10.1143/jjap.43.1205 ◽

2004 ◽

Vol 43 (3) ◽

pp. 1205-1206 ◽

Cited By ~ 4

Author(s):

Takaaki Hibi ◽

Takaharu Nagatomi ◽

Yoshizo Takai ◽

Ken-ichi Obori ◽

Syogo Awata ◽

...

Keyword(s):

Monte Carlo ◽

Electron Impact ◽

Monte Carlo Study ◽

X Ray ◽

Substrate Structure ◽

Film Substrate

Download Full-text

The Electricity Performance of Flexible Piezoelectric Generator

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.556-562.2035 ◽

2014 ◽

Vol 556-562 ◽

pp. 2035-2038

Author(s):

Guo Hua Liu ◽

Li Sui ◽

Geng Chen Shi

Keyword(s):

Polyvinylidene Fluoride ◽

Electrical Energy ◽

Resonance Phenomenon ◽

Piezoelectric Film ◽

Substrate Structure ◽

Piezoelectric Generator ◽

Length Width ◽

Generation Capacity ◽

Titanium Alloy Substrate ◽

Wind Flows

A FPEG (flexible piezoelectric generator) composed of PVDF (polyvinylidene fluoride) piezoelectric film, conducting resin and titanium alloy substrate, which occupies less room and produces electrical energy while the axial wind flows through the oscillator surface. When the axial wind flows through the generator surface, generator begins to vibrate and produce electrical energy, as the wind speed reaches a critical value, generator yields resonance phenomenon. In this paper, more work was placed on how the substrate structure parameters such as length, width and thickness affected the power generation capacity in resonance mode.

Download Full-text

A piecewise linear model for analyzing thin film/substrate structure in flexible electronics

Acta Mechanica Solida Sinica ◽

10.1016/s0894-9166(14)60050-1 ◽

2014 ◽

Vol 27 (4) ◽

pp. 420-428 ◽

Cited By ~ 2

Author(s):

Xianhong Meng ◽

Ming Li ◽

Yilin Xing ◽

Haijun Wang

Keyword(s):

Thin Film ◽

Linear Model ◽

Flexible Electronics ◽

Piecewise Linear ◽

Substrate Structure ◽

Piecewise Linear Model ◽

Film Substrate

Download Full-text

Electrical-driven delamination of flexible piezoelectric system and its applications in surface energy testing

Journal of Applied Mechanics ◽

10.1115/1.4050475 ◽

2021 ◽

pp. 1-12

Author(s):

Luqiao Qi ◽

Yan Shi ◽

Cheng Huang ◽

Zhi Li ◽

Cun-Fa Gao

Keyword(s):

Surface Energy ◽

Piezoelectric Film ◽

Maxwell Stress ◽

Current Experiment ◽

Electrical Load ◽

Soft Substrate ◽

Mechanics Model ◽

Flexible Film ◽

Film Substrate ◽

Effect Of Surface

Abstract In the present work, a novel experiment for flexible piezoelectric system was introduced. The flexible piezoelectric film was spontaneously contact with the soft substrate conformably. And after driven by pure electrical load, the delamination between the film-substrate systems can be observed visually. By thoroughly analyses and eliminating the influence of gravity, the “force” that prevents the delamination points to the effect of surface energy. Apparently, the deformation of the flexible film is quite small, linear constitutive model still dominates the mechanics of the system in this scenario. Moreover, different from traditional piezoelectric system, the Maxwell stress cannot be neglected in current experiment. A simple mechanics model is derived in current work to reveal the mechanism behind the experiment.

Download Full-text

Analyses of Interfacial Thermal Stresses for DLC/WC-Co

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.189-193.3870 ◽

2011 ◽

Vol 189-193 ◽

pp. 3870-3873

Author(s):

Jun Zhang ◽

Yang Li ◽

Xin Li Wei

Keyword(s):

Thermal Stresses ◽

Fem Simulation ◽

Thermal Expansion Mismatch ◽

Airy Functions ◽

Cobalt Alloy ◽

Interface Damage ◽

Substrate Structure ◽

Stress Strain Relation ◽

Calculation Results ◽

Film Substrate

Thermal expansion mismatch is the most important which leads to the film/substrate interface damage and destruction. In this paper, the interface stresses analyses was conducted using Airy functions for the diamond-like carbon (DLC) film/ tungsten cobalt alloy(WC-Co) substrate structure; according to stress-strain relation, obtain the interface stress expression by substituting into the boundary conditions for giving parameter. The calculation results were analyzed and compared with the FEM simulation.

Download Full-text