Mechanical Properties of Si3N4-SiC Composites Sintered by HPHT Method

2010 ◽  
Vol 63 ◽  
pp. 396-401 ◽  
Author(s):  
Piotr Klimczyk
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
High Pressure ◽  
High Temperature ◽  
Young Modulus ◽  
High Pressure High Temperature ◽  
Sic Composites

Three types: micro-, submicro- and nano-structured Si3N4-SiC composites have been obtained by High Pressure-High Temperature (HPHT) sintering. Density, Young modulus, hardness and fracture toughness have been measured. Composites obtained from sub-micron powders are characterized by better mechanical properties than composites obtained from nanopowders.

A Novel Method to Recycle Scrap Tires: High-Pressure High-Temperature Sintering

2002 ◽  
Vol 75 (5) ◽  
pp. 955-968 ◽  
Author(s):  
Jeremy E. Morin ◽  
Drew E. Williams ◽  
Richard J. Farris
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
High Temperature ◽  
Rubber Particle ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Scrap Tires ◽  
Vulcanized Rubber ◽  
High Pressure High Temperature ◽  
Styrene Butadiene

Abstract High-pressure high-temperature sintering (HPHTS) is a novel recycling technique that makes it possible to recycle vulcanized rubber powders made from waste rubber (namely scrap tires) through only the application of heat and pressure. A brief look into the mechanism of sintering will be presented along with information about the influence of molding variables, such as time, temperature, pressure and rubber particle size on the mechanical properties of the produced parts. One of the most interesting observations is that powders of every crosslinked elastomer attempted sintered together via this technique, including silicone rubber (SI), sulfur cured [natural rubber (NR), ethylene-propylene-diene rubber (EPDM), styrene-butadiene rubber (SBR)], peroxide cured butadiene rubber (BR), and fluoroelastomers (FKM). Early work on sintered rubber made from commercially available rubber powder had a modulus of 1 to 2 MPa, strength of 4 to 7 MPa and an elongation at break of 150–250%. Recently, in-house ground samples of SBR have had sintered values over 9.5 MPa strength and 275% elongation, or greater than 60% retention of the original properties. Many of these mechanical properties are comparable with industrially manufactured rubbers, and it is believed that recycled rubbers produced via HPHTS offer the potential to replace virgin rubber in numerous applications.

Effect of pressure on the phase transformations and mechanical properties of 10 mol% Mg-PSZ sintered by HPHT

CrystEngComm ◽  
2022 ◽  
Author(s):  
Jian Wang ◽  
Zhiwen Wang ◽  
Yongkui Wang ◽  
Hongan Ma ◽  
Shuai Fang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
High Temperature ◽  
Phase Transformations ◽  
Stabilized Zirconia ◽  
Zirconia Ceramics ◽  
Effect Of Pressure ◽  
High Pressure High Temperature

MgO (10 mol%)-stabilized zirconia ceramics were obtained using high-pressure high-temperature (HPHT) sintering. The effects of the sintering pressure (2.5, 3.7, and 5.0 GPa) on the phase transformations and hardness were...

Microstructure and Mechanical Properties of C/SiC Composites Prepared at Low Temperatures

2008 ◽  
Vol 368-372 ◽  
pp. 849-851
Author(s):  
Chang Cheng Zhou ◽  
Chang Rui Zhang ◽  
Hai Feng Hu ◽  
Yu Di Zhang ◽  
Zhi Yi Wang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Fracture Toughness ◽  
Shear Strength ◽  
High Temperature ◽  
Low Temperatures ◽  
High Performance ◽  
Microstructure And Mechanical Properties ◽  
Potential Applications ◽  
Sic Composites

2D-C/SiC composites with high performance were prepared at temperatures as low as 900 °C. The flexural strength of the composites reached 329.61MPa, the same level as the composites prepared at 1200°C, and shear strength and fracture toughness were 32.14MPa and 14.65MPa·m1/2, respectively. The microstructure and mechanical properties of the composites after heat-treatment at 1600°C were also investigated to determine the potential applications at high temperature.

Stress and dislocations in diamond–SiC composites sintered at high pressure, high temperature conditions

2009 ◽  
Vol 40 (5) ◽  
pp. 566-572 ◽  
Author(s):  
Stephen Nauyoks ◽  
Monika Wieligor ◽  
T.W. Zerda ◽  
Levente Balogh ◽  
Tamas Ungar ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Temperature Conditions ◽  
High Pressure High Temperature ◽  
Sic Composites

The Oxidation Resistance of ZrB2-SiC Composites Fabricated by High Pressure and High Temperature Sintering

2016 ◽  
Vol 697 ◽  
pp. 680-684
Author(s):  
Xiao Tong Zhao ◽  
Hai Long Wang ◽  
Rui Zhang
Keyword(s):  
Mechanical Properties ◽  
High Pressure ◽  
High Temperature ◽  
Flexural Strength ◽  
Oxidation Resistance ◽  
Vickers Hardness ◽  
Glass Phase ◽  
Sic Composites

Dense ZrB2-SiC composites were fabricated by high pressure and high temperature sintering(HPHT) at 1500 oC for 3 min under a pressure of 5 GPa. The vickers’ hardness of ZrB2-SiC composite is 25 GPa. The flexural strength of the ZrB2-SiC composite is 300 MPa with the amount of SiC increased to 30wt.%, which increased after the composites oxidized at high temperature. The generated glass phase like SiO2 sealed pores and cracks on the surface of the ZrB2-SiC composite to increase the mechanical properties of the ZrB2-SiC composite. After oxdized at 1500oC for 45 mins, the dense oxidized film formed on the surface of ZrB2-SiC composites to improve the resistance oxi dation of ZrB2 ceramics.

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