scholarly journals Effect of heating rate on properties of transparent aluminum oxynitride sintered by spark plasma sintering

2018 ◽  
Author(s):  
Yingchun Shan ◽  
Xialu Wei ◽  
Xiannian Sun ◽  
Elisa Torresani ◽  
Eugene A. Olevsky ◽  
...  
Keyword(s):  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Aluminum Oxynitride ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Comparison of Conventional and Flash Spark Plasma Sintering of Cu–Cr Pseudo-Alloys: Kinetics, Structure, Properties

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 141
Author(s):  
Kirill V. Kuskov ◽  
Mohammad Abedi ◽  
Dmitry O. Moskovskikh ◽  
Illia Serhiienko ◽  
Alexander S. Mukasyan
Keyword(s):  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Electric Circuits ◽  
Nanostructured Particles ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
The Media ◽  
Copper Chromium ◽  
Kinetics Of ◽  
Structure Properties

Spark plasma sintering (SPS) is widely used for the consolidation of different materials. Copper-based pseudo alloys have found a variety of applications including as electrodes in vacuum interrupters of high-voltage electric circuits. How does the kinetics of SPS consolidation for such alloys depend on the heating rate? Do SPS kinetics depend on the microstructure of the media to be sintered? These questions were addressed by the investigation of SPS kinetics in the heating rate range of 0.1 to 50 K/s. The latter conditions were achieved through flash spark plasma sintering (FSPS). We also compared the sintering kinetics for the conventional copper–chromium mixture and for the mechanically induced copper/chromium nanostructured particles. It was shown that, under FSPS conditions, the observed maximum consolidation rates were 20–30 times higher than that for conventional SPS with a heating rate of 100 K/min. Under the investigated conditions, the sintering rate for mechanically induced composite Cu/Cr particles was 2–4 times higher compared to the conventional Cu + Cr mixtures. The apparent sintering activation energy for the Cu/Cr powder was twice less than that for Cu–Cr mixture. It was concluded that the FSPS of nanostructured powders is an efficient approach for the fabrication of pseudo-alloys.

Impact of Heating Rate on the Tribological and Corrosion Properties of AISI 52100 Bearing Steel Consolidated via Spark Plasma Sintering

2021 ◽  
Author(s):  
Akeem Yusuf Adesina ◽  
Muzafar Hussain ◽  
Abbas Saeed Hakeem ◽  
Abdul Samad Mohammed ◽  
Muhammad Ali Ehsan ◽  
...  
Keyword(s):  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Bearing Steel ◽  
Corrosion Properties ◽  
Plasma Sintering ◽  
Aisi 52100 ◽  
Spark Plasma

Microstructure and Mechanical Properties of Spark-Plasma-Sintered SiC-TiC Composites

2005 ◽  
Vol 287 ◽  
pp. 335-339 ◽  
Author(s):  
Kyeong Sik Cho ◽  
Kwang Soon Lee
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Applied Pressure ◽  
Argon Atmosphere ◽  
Full Density ◽  
Plasma Sintering ◽  
Spark Plasma

Rapid densification of the SiC-10, 20, 30, 40wt% TiC powder with Al, B and C additives was carried out by spark plasma sintering (SPS). In the present SPS process, the heating rate and applied pressure were kept at 100°C/min and at 40 MPa, while the sintering temperature varied from 1600-1800°C in an argon atmosphere. The full density of SiC-TiC composites was achieved at a temperature above 1800°C by spark plasma sintering. The 3C phase of SiC in the composites was transformed to 6H and 4H by increasing the process temperature and the TiC content. By tailoring the microstructure of the spark-plasma-sintered SiC-TiC composites, their toughness could be maintained without a notable reduction in strength. The strength of 720 MPa and the fracture toughness of 6.3 MPa·m1/2 were obtained in the SiC-40wt% TiC composite prepared at 1800°C for 20 min.

Fabrication of High Dense ZnSe Ceramic by Spark Plasma Sintering: The Effect of the Powder Process Method

2018 ◽  
Vol 281 ◽  
pp. 661-666
Author(s):  
Jia Lin Gao ◽  
Peng Liu ◽  
Jian Zhang ◽  
Xiao Dong Xu ◽  
Ding Yuan Tang
Keyword(s):  
Relative Density ◽  
Ball Milling ◽  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Zinc Selenide ◽  
Plasma Sintering ◽  
Planetary Ball Milling ◽  
Spark Plasma ◽  
Process Method

Zinc Selenide ceramic was successfully fabricated by spark plasma sintering in the study. The ZnSe raw powders were handled with two different methods such as grinding and planetary ball milling, respectively. The relative density, microstructure and transmittance of the ZnSe ceramic sintered under the same sintering parameter with two type powders was investigated. The results shown that the performance of the powder processed by ball milling was more effective than that by grinding. Furthermore, the maximum relative density can reach 99.8% when the ZnSe powder treated by ball milling were sintered at 950 oC for 30 min with the heating rate of 10 oC/min under 100 MPa.

Fabrication of transparent ZnS ceramic by optimizing the heating rate in spark plasma sintering process

2015 ◽  
Vol 50 ◽  
pp. 36-39 ◽  
Author(s):  
Yuanzhi Chen ◽  
Le Zhang ◽  
Jian Zhang ◽  
Peng Liu ◽  
Tianyuan Zhou ◽  
...  
Keyword(s):  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Sintering Process ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Density, Microstructure, Strength and Fractography of Spark Plasma and Conventionally Sintered Mn Steels

2017 ◽  
Vol 17 (2) ◽  
pp. 93-103
Author(s):  
M. Tenerowicz-Zaba ◽  
M. Kupkova ◽  
M. Kabatova ◽  
E. Dudrova ◽  
M. Dzupon ◽  
...  
Keyword(s):  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Failure Mechanisms ◽  
Uniaxial Pressure ◽  
Preliminary Results ◽  
Heating And Cooling ◽  
Plasma Sintering ◽  
Conventional Sintering ◽  
Spark Plasma ◽  
Sintered Materials

Abstract The aim of the study was to investigate Spark Plasma Sintering (SPS) of 1-3%Mn steels and compare the resultant microstructures, strengths and failure mechanisms with those of conventionally sintered materials. SPS was performed in a vacuum of 5 Pa at 1000°C for 15min under a uniaxial pressure of 20 MPa. The heating rate of 100°C/min was applied. For conventional processing, mixtures of powders were prepared in a Turbula mixer for 30 minutes. Samples were single pressed at 660 MPa, according to PN-EN ISO 2740 standard. Sintering of compacts was carried out in a laboratory tube furnace at 1120°C and 1250°C for 60 minutes in a mixture of 95%N2-5%H2. Heating and cooling rates were 75C°/min and 60°C/min, respectively. The density of SPS samples was higher (up to 7.37 g/cm3) than those after conventional sintering (up to 6.7 g/cm3). Yield strengths of SPS samples were in the range 920-1220 MPa, compared to the maximum of 602 MPa for conventionally sintered Fe-3%Mn-0.8%C. Transverse rupture strengths were the same for this alloy, 1234 MPa, but reached 1473 MPa for SPS 2Mn variant. Interfaces in SPS samples were significantly less contaminated with oxides, which is the result of a more favorable microclimate and pressure acting during SPS. These preliminary results indicate that further research on the SPS of Mn steels is warranted.

scholarly journals Microstructure and Properties of h-BN-Reinforced Titanium Alloy Matrix Composite Fabricated with Optimized Spark Plasma Sintering Parameters

2021 ◽  
Author(s):  
John Olorunfemi Abe ◽  
Olawale Popoola ◽  
Patricia Popoola ◽  
Emmanuel Ajenifuja
Keyword(s):  
Wear Rate ◽  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Optical Microscope ◽  
Holding Time ◽  
Solid Matrix ◽  
Wear Properties ◽  
Alloy Matrix ◽  
Plasma Sintering ◽  
Spark Plasma

Abstract The effects of different combinations of spark plasma sintering parameters: temperature, pressure, heating rate and holding time, at three levels on the microstructure, densification, mechanical and wear properties of Ti6Al4V/h-BN binary composite were considered in this work. The design method of Taguchi and signal-to-noise (S/N) ratios analysis and main effects of the parameters were employed to randomize and optimize the levels of the SPS parameters. The microstructure and phase features of the samples sintered were analyzed by using a scanning electron microscope, an optical microscope and X-ray diffractometer respectively. Archimedes’ method, Vickers microhardness tester and a tribometer were used to evaluate the densification, microhardness and wear profiles of the samples. The most important parameter levels for optimum quality characteristics of the sintered composite were obtained at temperature, pressure, heating rate and holding time of 1000 °C, 30 MPa, 100 °C/min and 10 min, respectively. Ti6Al4V/h-BN composite approaching complete theoretical densification of 99.54%, microhardness value of 7.03 GPa, 1.66 GPa yield strength, 2.29 GPa ultimate tensile strength and wear rate of 8.075 x 10-6 mm3/Nm, respectively was produced with the optimized process parameters. The microhardness improved by approximately 216% and the wear rate improved by 97.8% of the Ti6Al4V alloy matrix. The improved microstructure, higher densification, mechanical and wear properties of the optimized composite were promoted by high sintering temperature and low heating rate which ensured adequate diffusional mass transport, achievement of refined grains, better pore filling and formation of solid matrix-reinforcement interfacial integrity.

scholarly journals Effect of the heating rate on the microstructure of a ferritic ODS steel with four oxide formers (Y-Ti-Al-Zr) consolidated by spark plasma sintering (SPS)

2019 ◽  
Vol 518 ◽  
pp. 190-201 ◽  
Author(s):  
E. Macía ◽  
A. García-Junceda ◽  
M. Serrano ◽  
M. Hernández-Mayoral ◽  
L.A. Diaz ◽  
...  
Keyword(s):  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Ods Steel ◽  
Plasma Sintering ◽  
Spark Plasma
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