Ceramics of Ta-doping stabilized orthorhombic ZrO2 densified by spark plasma sintering and the effect of post-annealing in air

2017 ◽  
Vol 130 ◽  
pp. 128-132 ◽  
Author(s):  
Gabriele Sponchia ◽  
Bibi Malmal Moshtaghioun ◽  
Alvise Benedetti ◽  
Pietro Riello ◽  
Diego Gómez-García ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Post Annealing ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Ta Doping

Post-annealing effect on transparent Mg-Zn aluminate solid solutions fabricated by spark plasma sintering

2019 ◽  
Vol 39 (16) ◽  
pp. 5350-5357 ◽  
Author(s):  
Sangwoo Nam ◽  
Shinhoo Kang ◽  
Byung-Nam Kim ◽  
In-Ho Jung ◽  
Young-Min Kim
Keyword(s):  
Spark Plasma Sintering ◽  
Solid Solutions ◽  
Annealing Effect ◽  
Post Annealing ◽  
Plasma Sintering ◽  
Spark Plasma

Influence of pre- and post-annealing on discoloration of MgAl 2 O 4 spinel fabricated by spark-plasma-sintering (SPS)

2016 ◽  
Vol 36 (12) ◽  
pp. 2961-2968 ◽  
Author(s):  
Koji Morita ◽  
Byung-Nam Kim ◽  
Hidehiro Yoshida ◽  
Keijiro Hiraga ◽  
Yoshio Sakka
Keyword(s):  
Spark Plasma Sintering ◽  
Post Annealing ◽  
Plasma Sintering ◽  
Spark Plasma

Superplastic Deformation of Nano-Sized α-Sialon Ceramics

2007 ◽  
Vol 336-338 ◽  
pp. 1001-1004 ◽  
Author(s):  
Xin Xu ◽  
Toshiyuki Nishimura ◽  
Naoto Hirosaki ◽  
Rong Jun Xie ◽  
Yoshinobu Yamamoto ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Spark Plasma Sintering ◽  
Microstructural Evolution ◽  
Mechanical Milling ◽  
Superplastic Deformation ◽  
Transient Liquid Phase ◽  
High Energy ◽  
Post Annealing ◽  
Plasma Sintering ◽  
Spark Plasma

In previous report, we succeeded in preparing dense nano-sized ceramics with the composition of Y- α-sialon (m=1.35, n=0.675) by high-energy mechanical milling followed by spark plasma sintering. The superplastic deformation of the obtained nano-ceramics was studied in this report. A good ductility of the nano-sized ceramics has been confirmed, which arised from the nano-sized grains and large amount of transient liquid phase. The effects of deformation on the phase and microstructural evolution were also studied. The nano-sized grains promoted the formation of elongated α-sialon grains during post-annealing at 1850oC for 3 h, which would strengthen and toughen the deformed ceramics.

scholarly journals Dual Substitution and Spark Plasma Sintering to Improve Ionic Conductivity of Garnet Li7La3Zr2O12

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 721 ◽  
Author(s):  
Zhencai Dong ◽  
Chao Xu ◽  
Yongmin Wu ◽  
Weiping Tang ◽  
Shufeng Song ◽  
...  
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Spark Plasma Sintering ◽  
Solid Electrolytes ◽  
Room Temperature ◽  
Ionic Conductivities ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Total Ionic Conductivity ◽  
Ta Doping

Garnet Li7La3Zr2O12 is one of the most promising solid electrolytes used for solid-state lithium batteries. However, low ionic conductivity impedes its application. Herein, we report Ta-doping garnets with compositions of Li7-xLa3Zr2-xTaxO12 (0.1 ≤ x ≤ 0.75) obtained by solid-state reaction and free sintering, which was facilitated by graphene oxide (GO). Furthermore, to optimize Li6.6La3Zr1.6Ta0.4O12, Mg2+ was select as a second dopant. The dual substitution of Ta5+ for Zr4+ and Mg2+ for Li+ with a composition of Li6.5Mg0.05La3Zr1.6Ta0.4O12 showed an enhanced total ionic conductivity of 6.1 × 10−4 S cm−1 at room temperature. Additionally, spark plasma sintering (SPS) was applied to further densify the garnets and enhance their ionic conductivities. Both SPS specimens present higher conductivities than those produced by the conventional free sintering. At room temperature, the highest ionic conductivity of Li6.5Mg0.05La3Zr1.6Ta0.4O12 sintered at 1000 °C is 8.8 × 10−4 S cm−1, and that of Li6.6La3Zr1.6Ta0.4O12 sintered at 1050 °C is 1.18 × 10−3 S cm−1.

Fabrication and Mechanical Properties of ultra fine WC-6wt.%Co by Spark Plasma Sintering Process

2011 ◽  
Vol 49 (01) ◽  
pp. 40-45 ◽  
Author(s):  
Hyun-Kuk Park ◽  
Seung-Min Lee ◽  
Hee-Jun Youn ◽  
Ki-Sang Bang ◽  
Ik-Hyun Oh
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Sintering Process ◽  
Plasma Sintering ◽  
Spark Plasma
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