Porous electrically conductive materials produced by Spark Plasma Sintering and hot pressing of nanodiamonds

2015 ◽  
Vol 41 (9) ◽  
pp. 12459-12463 ◽  
Author(s):  
Arina V. Ukhina ◽  
Dina V. Dudina ◽  
Alexander G. Anisimov ◽  
Vyacheslav I. Mali ◽  
Natalia V. Bulina ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Hot Pressing ◽  
Electrically Conductive ◽  
Conductive Materials ◽  
Plasma Sintering ◽  
Spark Plasma

Spark Plasma Sintering and Hot Pressing Sintering of Nanocrystalline WC-10CO-0.8VC

2007 ◽  
Vol 534-536 ◽  
pp. 1229-1232
Author(s):  
Li Hui Zhu ◽  
Guang Jie Shao ◽  
Yi Xiong Liu ◽  
Dave Siddle
Keyword(s):  
Relative Density ◽  
Spark Plasma Sintering ◽  
Hot Pressing ◽  
Nanocrystalline Powders ◽  
Microstructure And Properties ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Hot Pressing Sintering

WC-10Co-0.8VC nanocrystalline powders were sintered by spark plasma sintering (SPS) and hot pressing sintering (HPS), and the microstructure and properties were compared. Results show that, sintered at 1300°C, the sample prepared by SPS for only 3 minutes has higher density than that prepared by HPS for 60 minutes. SEM and SPM observation shows SPS at 1200°C has a more uniform and finer microstructure, and most of the WC grains are smaller than 100nm. It has a relative density of 95.1%, HV30 of 1887, and KIC of 11.5 MPam1/2. If a suitable sintering parameter is chosen, SPS is a promising consolidation technique to prepare nanocrystalline WC-10Co-0.8VC with improved properties.

Microstructure and Magnetic Properties of Hot-Pressed and Hot-Deformed Composite Magnets Produced by Spark Plasma Sintering Method

2011 ◽  
Vol 686 ◽  
pp. 740-744 ◽  
Author(s):  
Yi Long Ma ◽  
Deng Ming Chen ◽  
Qian Shen ◽  
Peng Jun Cao
Keyword(s):  
Magnetic Properties ◽  
Spark Plasma Sintering ◽  
Hot Pressing ◽  
Magnetic Energy ◽  
Pressing Temperature ◽  
Energy Product ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Products ◽  
Fe Addition

Bulk isotropic and anisotropic Nd13.5Fe80.4Ga0.5B5.6 and Nd13.5Fe80.4Ga0.5B5.6/Fe magnets were synthesized by applying spark plasma sintering (SPS) technique. The effect of hot-pressing temperature on the magnetic properties of hot-pressed (HP) and hot-deformed (HD) magnets without additive and with 5% Fe addition was investigated. With increasing sintering temperature for HP magnets, the grain grew gradually. For HD magnets, the optimal magnetic properties could be obtained at hot-pressing temperature 680°C due to the development of desired c-axis texture and uniform microstructure, which resulted from the appropriate and uniform grain size in HP magnets. Fe addition could enhance remanence (Br) and magnetic energy products ((BH)m) of HP and HD magnets. However, the maximum magnetic energy product of HD magnets decreased when hot-pressing temperature was higher than 650°C.

A Novel Approach for Preparing Electrically Conductive SiAlON-TiN Composites by Spark Plasma Sintering

2008 ◽  
Vol 403 ◽  
pp. 243-244
Author(s):  
E. Ayas ◽  
Alpagut Kara ◽  
Ferhat Kara
Keyword(s):  
Spark Plasma Sintering ◽  
Sem Analysis ◽  
Tio2 Powder ◽  
Mechanical Mixing ◽  
Electrically Conductive ◽  
Plasma Sintering ◽  
Novel Approach ◽  
Spark Plasma ◽  
Xrd Studies

An effective approach for preparing electrically conductive SiAlON-TiN composites was developed. Granules of a designed composition of α- SiAlON was obtained by spray drying and coated with varying amounts of TiO2 powder homogenously by mechanical mixing. Fully dense composites were obtained by spark plasma sintering (SPS) under a pressure of 50 MPa at 1650°C for 5min. According to the SEM analysis, unique microstructures containing continuously segregated in-situ formed TiN phase in 3-D were achieved. Additionally, XRD studies revealed that all TiO2 was successfully converted to TiN. The resistivity of the α-β SiAlON (1x1011 .m) was drastically reduced with the addition of only 5 vol. % TiO2 (2x10-4 .m).

A comparative study of the hot pressing and spark plasma sintering of Al2O3–ZrO2–Ti(C,N) powders

2015 ◽  
Vol 51 (10) ◽  
pp. 1047-1053 ◽  
Author(s):  
V. N. Chuvil’deev ◽  
M. S. Boldin ◽  
Ya. G. Dyatlova ◽  
V. I. Rumyantsev ◽  
S. S. Ordanyan
Keyword(s):  
Comparative Study ◽  
Spark Plasma Sintering ◽  
Hot Pressing ◽  
Plasma Sintering ◽  
Spark Plasma
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