scholarly journals ED-machinable Ceramics with Oxide Matrix: Influence of Particle Size and Volume Fraction of the Electrical Conductive Phase on the Mechanical and Electrical Properties and the EDM Characteristics

Procedia CIRP ◽  
2018 ◽  
Vol 68 ◽  
pp. 22-27 ◽  
Author(s):  
Andrea Gommeringer ◽  
Ulrich Schmitt-Radloff ◽  
Philipp Ninz ◽  
Frank Kern ◽  
Fritz Klocke ◽  
...  
Keyword(s):  
Particle Size ◽  
Electrical Properties ◽  
Volume Fraction ◽  
Conductive Phase ◽  
Mechanical And Electrical Properties ◽  
Oxide Matrix ◽  
Matrix Influence

Effect of Ag addition in Sn on growth of SnTe compound during reaction between molten solder and tellurium

2010 ◽  
Vol 25 (2) ◽  
pp. 391-395 ◽  
Author(s):  
Chien-Neng Liao ◽  
Yen-Chun Huang
Keyword(s):  
Particle Size ◽  
Reaction Time ◽  
Electrical Properties ◽  
Bismuth Telluride ◽  
Molten Solder ◽  
Thermoelectric Modules ◽  
Ag Addition ◽  
Mean Particle Size ◽  
Mechanical And Electrical Properties ◽  
The Mean

SnTe is the most common compound formed at the bismuth telluride/metal soldered junction of thermoelectric modules. It affects the mechanical and electrical properties of the soldered junction. In the study we investigate the growth of SnTe compound during reaction between molten Sn–3.5Ag solder and tellurium at 250 °C. We found that the growth of SnTe is suppressed by Ag–Te bilayer compounds that block further reaction between liquid Sn and Te. With increasing reaction time, the SnTe morphology becomes rough as a result of coarsening of SnTe grains. The growth of SnTe grains follows the conservative ripening kinetics with the mean particle size proportional to one-third power of reaction time.

scholarly journals Mechanical and Electrical Properties of Glass and Carbon Fiber-Reinforced Composites

1991 ◽  
Vol 113 (3) ◽  
pp. 176-181 ◽  
Author(s):  
G. R. Headifen ◽  
E. P. Fahrenthold
Keyword(s):  
Electrical Properties ◽  
Volume Fraction ◽  
High Energy ◽  
Composite Fiber ◽  
Pulsed Power ◽  
High Energy Density ◽  
Fiber Reinforced ◽  
Dynamics Modeling ◽  
Mechanical And Electrical Properties ◽  
Strength And Stiffness

The design of composite rotors for high-energy density pulsed power supplies demands accurate characterization of both the mechanical and electrical properties of fiber-reinforced epoxy. The mechanical properties of S-2 glass-epoxy, IM6 graphite-epoxy, and hybrid graphite-glass epoxy composites were measured in tension and torsion tests, providing strength and stiffness parameters for rotor dynamics modeling. Variable frequency electrical resistivity tests were conducted to allow estimation of eddy current losses arising in carbon-reinforced materials. Volume fraction measurements using electron microscopy and analysis by digestion allow for normalization of the test results with respect to composite fiber content. The experimental results were used to evaluate the micromechanical rule of mixtures and Halpin-Tsai correlations.

Physical, Mechanical and Electrical Properties of W-20 wt.% Cu Composite Produced by Liquid Phase Sintering Process

2014 ◽  
Vol 879 ◽  
pp. 21-26
Author(s):  
Fauzi Ismail ◽  
Mohd Asri Selamat ◽  
Norhamidi Muhamad ◽  
Abu Bakar Sulong ◽  
Nurzirah Abdul Majid
Keyword(s):  
Particle Size ◽  
Liquid Phase ◽  
Electrical Properties ◽  
Microstructure Evolution ◽  
Sintering Temperature ◽  
Cold Isostatic Pressing ◽  
Liquid Phase Sintering ◽  
Sintering Process ◽  
Composite Powders ◽  
Mechanical And Electrical Properties

In this study, the effect of sintering temperature on the properties of tungsten-copper (W-Cu) composite produced by liquid phase sintering (LPS) process has been investigated. W-20 wt.% Cu composite powders with particle size less than 1 μm was prepared by cold compaction and followed by cold isostatic pressing. The green specimens were then sintered under nitrogen based atmosphere in the temperature range of 1100°C to 1300°C. The sintering studies were conducted to determine the extent of densification and corresponding to microstructure changes. In addition, the properties of the sintered specimens such as physical appearance, microstructure evolution, mechanical and electrical properties were presented and discussed.

scholarly journals Preparation, Characterization, and Modeling of Carbon Nanofiber/Epoxy Nanocomposites

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Lan-Hui Sun ◽  
Zoubeida Ounaies ◽  
Xin-Lin Gao ◽  
Casey A. Whalen ◽  
Zhen-Guo Yang
Keyword(s):  
Electrical Properties ◽  
Young’S Modulus ◽  
Carbon Nanofiber ◽  
Volume Fraction ◽  
Young's Modulus ◽  
Alternate Current ◽  
Epoxy Nanocomposites ◽  
Mechanical And Electrical Properties ◽  
Depth Study ◽  
Matrix Nanocomposites

There is a lack of systematic investigations on both mechanical and electrical properties of carbon nanofiber (CNF)-reinforced epoxy matrix nanocomposites. In this paper, an in-depth study of both static and dynamic mechanical behaviors and electrical properties of CNF/epoxy nanocomposites with various contents of CNFs is provided. A modified Halpin-Tsai equation is used to evaluate the Young's modulus and storage modulus of the nanocomposites. The values of Young's modulus predicted using this method account for the effect of the CNF agglomeration and fit well with those obtained experimentally. The results show that the highest tensile strength is found in the epoxy nanocomposite with a 1.0 wt% CNFs. The alternate-current (AC) electrical properties of the CNF/epoxy nanocomposites exhibit a typical insulator-conductor transition. The conductivity increases by four orders of magnitude with the addition of 0.1 wt% (0.058 vol%) CNFs and by ten orders of magnitude for nanocomposites with CNF volume fractions higher than 1.0 wt% (0.578 vol%). The percolation threshold (i.e., the critical CNF volume fraction) is found to be at 0.057 vol%.

Synthesis and characterization of high-performance epoxy/ Ti3AlC2-reinforced conductive polymer composites

2019 ◽  
Vol 53 (26-27) ◽  
pp. 3861-3874 ◽  
Author(s):  
Vijayakumar M.P ◽  
Lingappa Rangaraj ◽  
Raja S
Keyword(s):  
Particle Size ◽  
Electrical Properties ◽  
Polymer Composites ◽  
High Performance ◽  
Filler Particle ◽  
Conductive Polymer ◽  
Simultaneous Increase ◽  
Particle Sizes ◽  
Mechanical And Electrical Properties ◽  
Conductive Polymer Composites

Titanium aluminium carbide powder was reaction synthesized and used as reinforcement in the aircraft grade epoxy matrix (LY556) to develop a high-performance conductive polymer composite. The particle sizes of 4 and 7 µm were employed from 0 to 40 wt.% to improve the mechanical and electrical properties of conductive polymer composites. It was observed that the percolation characteristics were exhibited at a critical threshold of 20 wt.% for both the filler particle sizes. Further, microstructural observations revealed the formation of a conductive network in the conductive polymer composites when the filler content was 20 wt.%. The tensile and flexural properties were increased when the particle size was decreased. Experimental values were then compared with the available analytical models for validation. The mechanical and electrical properties of the conductive polymer composites were optimized by tailoring the filler particle size to 4 µm and particle loading at 20 wt.%. Compared to neat epoxy, the optimized conductive polymer composites have shown a simultaneous increase in strength, stiffness and conductivity performances, which can find applications in aerospace and electronics industries.

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