Mica-Filled PVC Composites: Effect of Particle Size, Filler Concentration, and Surface Treatment of the Filler, on Mechanical and Electrical Properties of the Composites

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.

Download Full-text

Effect of particle size, fiber content, and surface treatment on the mechanical properties of maple-reinforced LLDPE produced by rotational molding

Polymers and Polymer Composites ◽

10.1177/0967391120916602 ◽

2020 ◽

pp. 096739112091660

Author(s):

Fatima Ezzahra Hanana ◽

Denis Rodrigue

Keyword(s):

Mechanical Properties ◽

Particle Size ◽

Surface Treatment ◽

Tensile Modulus ◽

Complete Characterization ◽

Fiber Content ◽

Wood Fibers ◽

Interface Quality ◽

Effect Of Particle Size ◽

The Impact

In this work, composites based on linear low-density polyethylene and maple wood fibers with and without surface treatment with maleated polyethylene (MAPE) were prepared by dry blending, followed by rotomolding to study the effect of particle size, fiber content, and surface treatment. From the samples produced, a complete characterization of the morphological and mechanical properties was performed. The results obtained showed that MAPE surface treatment improved the fiber–matrix interface quality, which improved the homogeneity, the thermal stability, and the mechanical properties of the composites. The results showed that the effect of particle size was significant as the tensile modulus increased by 7%, 40%, and 73% for 125–250, 250–355, and 355–500 µm at 30 wt% of maple fibers. The tensile strength also increased by 114% at the same fiber loading (30 wt%) when the particle size increased from 125–250 µm to 355–500 μm. Finally, the impact strength with 355–500 µm particles was 52% higher than for 125–250 µm particles at 30 wt%

Download Full-text

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.879.21 ◽

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.

Download Full-text