scholarly journals Study of the densification and grain growth mechanisms occurring during spark plasma sintering of different submicronic yttria-stabilized zirconia powders

2021 ◽  
Author(s):  
Andréas Flaureau ◽  
Alicia Weibel ◽  
Geoffroy Chevallier ◽  
Claude Estournès
Keyword(s):  
Grain Growth ◽  
Spark Plasma Sintering ◽  
Yttria Stabilized Zirconia ◽  
Growth Mechanisms ◽  
Stabilized Zirconia ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Zirconia Powders

Spark Plasma Sintering of Yttria-Stabilized Zirconia/Titanium Nitride Composites

2015 ◽  
Vol 1735 ◽  
Author(s):  
Paulo S. M. Silva ◽  
Fabio C. Fonseca
Keyword(s):  
Titanium Nitride ◽  
Spark Plasma Sintering ◽  
Yttria Stabilized Zirconia ◽  
X Rays ◽  
Stabilized Zirconia ◽  
Electrical Measurements ◽  
Mechanical Mixing ◽  
Metallic Behavior ◽  
Plasma Sintering ◽  
Spark Plasma

ABSTRACTComposites of 8 mol% yttria-stabilized zirconia (YSZ) and titanium nitride (TiN) were obtained by mechanical mixing of commercial powders. High-density samples of (1-x) YSZ / x TiN, with x = 0, 25, 50, and 75 wt.%, were obtained by spark plasma sintering (SPS) at 1450 °C for 5 min. Surface contamination with carbon from the SPS was eliminated by diamond sawing of parallel surfaces. X-rays diffraction analyses showed that samples are composed by a mixture of the initial phases, without appreciable reaction as inferred from calculated lattice parameters. dc 4-probe electrical measurements in the 100-850°C under showed that samples have a metallic behavior, indicating that the percolation threshold was attained for the sample with the lowest content of the TiN (x=25 wt.%), which corresponds to ∼27 vol.%.

Effect of Alumina Additions on Mechanical and Electrical Properties of 8mol% Yttria-Stabilized Zirconia Prepared by Spark Plasma Sintering

2006 ◽  
Vol 317-318 ◽  
pp. 917-920
Author(s):  
Jae Kwang Kim ◽  
Kyung Hun Kim ◽  
Yong Ho Choa ◽  
Jong Won Yoon ◽  
Kwang Bo Shim
Keyword(s):  
Electrical Conductivity ◽  
Grain Size ◽  
Relative Density ◽  
Spark Plasma Sintering ◽  
Average Particle Size ◽  
Yttria Stabilized Zirconia ◽  
Average Particle ◽  
Stabilized Zirconia ◽  
Plasma Sintering ◽  
Spark Plasma

Dense 8mol% yttria-stabilized zirconia (8YSZ) consisting of submicrometer-sized grains was prepared using spark plasma sintering (SPS) along with Al2O3 additives. The starting powder with average particle size of 50nm was densified to 98% of the relative density with short sintering time (5min) at 1200 while preserving a submicrometer grain size. The fracture toughness and bending strength showed maximum values of 2.54MPam1/2 and 380MPa at 2vol% alumina-added 8YSZ, due mainly to the higher relative density and small grain size. The electrical conductivity of 2vol% alumina-added 8YSZ was 0.0278 S/cm at 700 in airThus, alumina additions in 8YSZ using the SPS method are an effective process to improve the mechanical strength and electrical conductivity.

Particulate-Reinforced Tungsten Heavy Alloy/Yttria-Stabilized Zirconia Composites Sintered Through Spark Plasma Sintering

2020 ◽  
Vol 45 (11) ◽  
pp. 9283-9291
Author(s):  
A. Muthuchamy ◽  
Lakshmi Prasad Boggupalli ◽  
Digvijay Rajendra Yadav ◽  
N. Naveen Kumar ◽  
Dinesh K Agrawal ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Yttria Stabilized Zirconia ◽  
Heavy Alloy ◽  
Tungsten Heavy Alloy ◽  
Stabilized Zirconia ◽  
Plasma Sintering ◽  
Zirconia Composites ◽  
Spark Plasma ◽  
Particulate Reinforced
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