Densification and mechanical properties of pulsed electric current sintered B4C with in situ synthesized Al3BC obtained by the molten-salt method

2017 ◽  
Vol 37 (15) ◽  
pp. 4524-4531 ◽  
Author(s):  
Donglou Ren ◽  
Qihuang Deng ◽  
Ji Wang ◽  
Youbing Li ◽  
Mian Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molten Salt ◽  
Electric Current ◽  
Molten Salt Method ◽  
Pulsed Electric Current

Synthesis and Characterization of Magnesium Aluminate Spinel Porous Ceramics by Novel Molten Salt Method

2016 ◽  
Vol 697 ◽  
pp. 399-403 ◽  
Author(s):  
Xian Gong Deng ◽  
Jun Kai Wang ◽  
Hai Jun Zhang ◽  
Jiang Hao Liu ◽  
Shao Wei Zhang
Keyword(s):  
Molten Salt ◽  
Porous Ceramics ◽  
Magnesium Aluminate ◽  
Molten Salt Method ◽  
Magnesium Aluminate Spinel ◽  
X Ray Diffraction ◽  
Liquid Environment ◽  
X Ray

Magnesium aluminate spinel (MgAl2O4) porous ceramics were in-situ synthesized by heating the mixture of Al2O3 and MgCO3 with MgCl2 salt at 1400~1600 °C for 3 h, and then characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The morphology of as-prepared MgAl2O4 porous ceramics was dependent on the addition of MgCl2, and it indicated that the MgCl2 molten salt not only acted as a template for pore formation of the porous ceramics, but also provided a liquid environment for the synthesis of MgAl2O4.

Binder-Free Tungsten Carbide Fabricated by Pulsed Electric Current Sintering

2007 ◽  
Vol 534-536 ◽  
pp. 1153-1156 ◽  
Author(s):  
Koji Shimojima ◽  
Hiroyuki Hosokawa ◽  
Takeshi Nakajima ◽  
Masahiko Mizukami ◽  
Yoshiharu Yamamoto
Keyword(s):  
Mechanical Properties ◽  
Tungsten Carbide ◽  
Electric Current ◽  
Applied Pressure ◽  
High Hardness ◽  
Maximum Temperature ◽  
Pulsed Electric Current ◽  
Binder Free ◽  
Field Assisted Sintering ◽  
Sintering Condition

In this paper, we show some experimental results of binder-free WC sintered by Pulsed Electric Current Sintering (PECS) also known as Field Assisted Sintering Technology (FAST). These binder-free WC have extremely high hardness and stiffness. However, these mechanical properties are dependent on the sintering condition, e.g., maximum temperature, applied pressure, etc. We show some relationship between mechanical properties and sintering condition to improve to sinter the binder-free WC.

Mechanical Properties of Alumina Based Nanocomposites

2012 ◽  
Vol 527 ◽  
pp. 101-106 ◽  
Author(s):  
Erkka Kannisto ◽  
M. Erkin Cura ◽  
Erkki Levänen ◽  
Simo Pekka Hannula
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Electric Current ◽  
Critical Size ◽  
Rule Of Mixtures ◽  
Microstructure And Mechanical Properties ◽  
Nickel Particles ◽  
Pulsed Electric Current

To study the microstructure and mechanical properties of alumina nanocomposites, Al2O3/2.5 vol.% Ni and Al2O3/10 vol.% ZrO2 nanocomposites were consolidated by pulsed electric current sintering (PECS). Fracture toughness was found to increase by 13 % and 16 % respectively compared to reference alumina. Hardness increased slightly in Al2O3/Ni because of a fraction of nickel particles under the critical size (2 following the rule of mixtures. By investigating the results, causes of improved mechanical properties were critically evaluated.

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