Effect of sintering process on the microstructures and properties of in situ TiB2–TiC reinforced steel matrix composites produced by spark plasma sintering

2010 ◽  
Vol 210 (1) ◽  
pp. 91-95 ◽  
Author(s):  
Binghong Li ◽  
Ying Liu ◽  
Jun Li ◽  
Hui Cao ◽  
Lin He
Keyword(s):  
Spark Plasma Sintering ◽  
Steel Matrix ◽  
Matrix Composites ◽  
Sintering Process ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Reinforced Steel

scholarly journals Influence of ZrB2 on Microstructure and Properties of Steel Matrix Composites Prepared by Spark Plasma Sintering

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2459 ◽  
Author(s):  
Iwona Sulima ◽  
Pawel Hyjek ◽  
Lucyna Jaworska ◽  
Malgorzata Perek-Nowak
Keyword(s):  
Spark Plasma Sintering ◽  
Microstructural Analysis ◽  
Steel Matrix ◽  
Matrix Composites ◽  
Sintering Process ◽  
Wavelength Dispersive Spectroscopy ◽  
Mechanical And Tribological Properties ◽  
Plasma Sintering ◽  
316L Austenitic Stainless Steel ◽  
Spark Plasma

In this study, four composites with different ZrB2 content were made by the Spark Plasma Sintering (SPS/FAST) technique. The sintering process was carried out at 1373 K for 5 min under an argon atmosphere. The effect of ZrB2 reinforcing phase content on the density, microstructure, and mechanical and tribological properties of composites was investigated. The results were compared with experimental data obtained for 316L austenitic stainless steel without the reinforcing phase. The results showed that the ZrB2 content significantly affected the tested properties. With the increasing content of the ZrB2 reinforcing phase, there was an increase in the Young’s modulus and hardness and an improvement in the abrasive wear resistance of sintered composites. In all composites, new fine precipitates were formed and distributed in the steel matrix and along the grain boundaries. Microstructural analysis (Scanning Electron Microscopy (SEM), Wavelength Dispersive Spectroscopy (WDS)) has revealed that the fine precipitates chromium contained chromium as well as boron.

Spark Plasma Sintering of Silicon Nitride-Boron Carbide Composites

2008 ◽  
Vol 403 ◽  
pp. 225-226
Author(s):  
E. Ayas ◽  
A. Kalemtas ◽  
Gürsoy Arslan ◽  
Alpagut Kara ◽  
Ferhat Kara
Keyword(s):  
Electrical Resistivity ◽  
Spark Plasma Sintering ◽  
Xrd Analysis ◽  
Sintering Process ◽  
Electrically Conductive ◽  
Plasma Sintering ◽  
B4c Particles ◽  
Spark Plasma ◽  
In Situ Reactions

Si3N4-B4C composites containing fine and coarse B4C particles were produced using Al2O3 and Y2O3 as sintering additives via spark plasma sintering (SPS) technique. Phase assemblages of the produced composites were determined by XRD analysis. Si3N4, B4C and in situ formed SiC, h-BN and Si phases were observed. Even when incorporated in significant amounts, B4C was consumed readily in the Si3N4 based system. Consequently, full densification of these composites was found to be a very difficult task due to the simultaneous in-situ reactions, even in fast sintering process. Electrical resistivity measurements carried out at room temperature indicated that addition of both fine and coarse B4C particles decreased the electrical resistivity by several orders of magnitude due to the formation of electrically conductive in-situ phases, mainly SiC and metallic Si.

Improvements on the Properties of the In Situ MgB2/Fe Tapes Annealed by Spark Plasma Sintering Technique

2007 ◽  
Vol 546-549 ◽  
pp. 2059-2062
Author(s):  
Lin Ma ◽  
Hong Li Suo ◽  
Ying Wang ◽  
Hong Xia Ma ◽  
Min Liu ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Vacuum Condition ◽  
Vacuum Furnace ◽  
Sintering Process ◽  
Sintering Mechanism ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Powder In Tube ◽  
Sps Sintering

In-situ MgB2/Fe tapes were fabricated by the powder in tube (PIT) technology using Mg and B powders. The tapes were sintered by both an advanced spark plasma sintering (SPS) and a conventional vacuum furnace, respectively. The effects of these two sintering routes on the properties of the MgB2 tapes were investigated by the analysis of XRD, SEM and the magnetic Jc measurements. It was shown that at 10K, 0T, the magnetic Jc value of the tape sintered using SPS machine at 800°C for 15min under 30MPa were close to 106A/cm2, which was higher than that of the tapes annealed at 700°C for 2h under pressureless vacuum condition. It was found that the density and the homogeneity of the MgB2 core were strongly improved using SPS sintering process, which explained why the MgB2 tapes sintered by SPS method have a higher Jc value. Further enhancement of Jc in the tapes is expected for the understanding of the SPS sintering mechanism.

In Situ Synthesis of Alumina Matrix Composites by Spark Plasma Sintering

2013 ◽  
Vol 750 ◽  
pp. 92-95
Author(s):  
Zhong Chun Chen ◽  
Sri Nugroho ◽  
Akira Kawasaki
Keyword(s):  
Spark Plasma Sintering ◽  
Matrix Composites ◽  
Reactive Sintering ◽  
Alumina Matrix ◽  
Grain Sizes ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Al2o3 Phase ◽  
Al2o3 Matrix

Al2O3 matrix composites reinforced with Ba-b-Al2O3 phase were synthesized through reactive sintering using Al2O3 and BaCO3 as starting powders. Dense Al2O3/Ba-b-Al2O3 composites can be obtained by spark plasma sintering from Al2O3/BaO•Al2O3 powder, which was prepared by calcining Al2O3/BaCO3 powder mixture. The Ba-b-Al2O3 reinforcing phase exhibited an elongated morphology due to preferred diffusion of Ba cations. The existence of Ba-b-Al2O3 phase as well as low sintering temperature and short holding time during reactive sintering inhibit grain growth and thus result in small grain sizes of the Al2O3 matrix.

Microstructural Characterization of In Situ TiB Whiskers in Ti MMCs Fabricated by SPS

2007 ◽  
Vol 336-338 ◽  
pp. 1310-1312
Author(s):  
Hai Bo Feng ◽  
De Chang Jia ◽  
Yu Zhou ◽  
Qing Chang Meng
Keyword(s):  
Electron Microscopy ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Microstructural Characterization ◽  
Average Diameter ◽  
Matrix Composites ◽  
Plasma Sintering ◽  
Transmission Electron ◽  
Spark Plasma

The in situ TiB whisker reinforced titanium matrix composites were prepared by mechanical alloying followed by spark plasma sintering. X-ray diffraction, scanning electron microscopy and transmission electron microscopy were used to characterize the microstructure of the TiB whiskers. The effect of sintering temperature on morphologies of in situ TiB whiskers was evaluated. With the increase of spark plasma sintering temperature, the average diameter of in situ TiB whiskers increased. The in situ TiB whiskers exhibited a hexagonal shape with (100), (101) and (10 1 ) planes at the transverse section and a growth orientation of [010]TiB direction.

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