Densification of pure magnesium by spark plasma sintering-discussion of sintering mechanism

2019 ◽  
Vol 30 (11) ◽  
pp. 2649-2658 ◽  
Author(s):  
Ruifeng Liu ◽  
Wenxian Wang ◽  
Hongsheng Chen ◽  
Zhen Lu ◽  
Wei Zhao ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Pure Magnesium ◽  
Sintering Mechanism ◽  
Plasma Sintering ◽  
Spark Plasma

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.

Fe–6.5% Si/SiO2 powder cores prepared by spark plasma sintering: Magnetic properties and sintering mechanism

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744011 ◽  
Author(s):  
Lili Xu ◽  
Biao Yan
Keyword(s):  
Magnetic Properties ◽  
Electrical Resistivity ◽  
Spark Plasma Sintering ◽  
Experimental Result ◽  
High Electrical Resistivity ◽  
Sintering Mechanism ◽  
Plasma Sintering ◽  
Core Losses ◽  
Spark Plasma ◽  
Insulation Effect

The Fe–6.5% Si/SiO2 powder cores were prepared by dry-type stirring ball milling and subsequent spark plasma sintering (SPS). Microstructure, magnetic properties and sintering mechanism of Fe–6.5% Si/SiO2 powder core were investigated. The experimental result indicated that Fe–6.5% Si particles were perfectly surrounded by SiO2 insulating layer with cristobalite structure. Compared with Fe–6.5% Si powder core, Fe–6.5% Si/SiO2 powder core has 20 times higher electrical resistivity ([Formula: see text]) and maintained excellent soft magnetic properties ([Formula: see text] emu/g, [Formula: see text] Oe). Core losses decreased to nearly 1/10 of those of Fe–6.5% Si powder core due to the insulation effect of SiO2 particles. Sintering mechanisms of Fe–6.5% Si/SiO2 core-shell powders during spark plasma sintering are proposed on the basis of high electrical resistivity (easy to heat) and pin effects (easy to discharge) of SiO2 particles.

Phosphorescent luminescence of pure magnesium oxide transparent ceramics produced by spark plasma sintering

2013 ◽  
Vol 35 (3) ◽  
pp. 558-562 ◽  
Author(s):  
Shingo Wakahara ◽  
Takayuki Yanagida ◽  
Yuui Yokota ◽  
Yutaka Fujimoto ◽  
Valery Chani ◽  
...  
Keyword(s):  
Magnesium Oxide ◽  
Spark Plasma Sintering ◽  
Pure Magnesium ◽  
Transparent Ceramics ◽  
Plasma Sintering ◽  
Spark Plasma

Spark Plasma Sintering of α-Si3N4 Ceramics with MgO-Al2O3 as Sintering Additives

2007 ◽  
Vol 351 ◽  
pp. 176-179 ◽  
Author(s):  
Fa Qiang Yan ◽  
Fei Chen ◽  
Qiang Shen ◽  
Lian Meng Zhang
Keyword(s):  
Relative Density ◽  
Spark Plasma Sintering ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Close Correlation ◽  
Liquid Phase Sintering ◽  
Sintering Additives ◽  
Sintering Mechanism ◽  
Plasma Sintering ◽  
Spark Plasma

In the present study, α-Si3N4 is prepared by using MgO and Al2O3 as the sintering additives and spark plasma sintering (SPS) technique. The SPS sintering mechanism is discussed. The relationship between the content of sintering additives, sintering temperature and relative densities of the samples is analyzed. The results suggest that when the sintering temperature is 1300-1500°C, the content of sintering additives is 6wt.%-10wt.%, the relative density of sintered samples is 64%-96%. When the sintering temperature reaches 1400°C, the content of sintering additives is 10%, the samples can be fully dense sintered and the relative density can be up to 95%. The sintering mechanism is liquid phase sintering. The bending strength of the sintered samples is 50-403MPa and has a close correlation with the relative density.

Approach of the spark plasma sintering mechanism in Zr57Cu20Al10Ni8Ti5 metallic glass

2011 ◽  
Vol 509 (3) ◽  
pp. 1011-1019 ◽  
Author(s):  
Sophie Nowak ◽  
Loïc Perrière ◽  
Lucas Dembinski ◽  
Sandrine Tusseau-Nenez ◽  
Yannick Champion
Keyword(s):  
Metallic Glass ◽  
Spark Plasma Sintering ◽  
Sintering Mechanism ◽  
Plasma Sintering ◽  
Spark Plasma

The sintering mechanism in spark plasma sintering – Proof of the occurrence of spark discharge

2014 ◽  
Vol 81 ◽  
pp. 56-59 ◽  
Author(s):  
Zhao-Hui Zhang ◽  
Zhen-Feng Liu ◽  
Ji-Fang Lu ◽  
Xiang-Bo Shen ◽  
Fu-Chi Wang ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Spark Discharge ◽  
Sintering Mechanism ◽  
Plasma Sintering ◽  
Spark Plasma
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