High Hardness BaCb-(BxOy/BN) Composites with 3D Mesh-Like Fine Grain-Boundary Structure by Reactive Spark Plasma Sintering

2012 ◽  
Vol 12 (2) ◽  
pp. 959-965 ◽  
Author(s):  
Oleg Vasylkiv ◽  
Hanna Borodianska ◽  
Petre Badica ◽  
Salvatore Grasso ◽  
Yoshio Sakka ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Spark Plasma Sintering ◽  
High Hardness ◽  
Boundary Structure ◽  
3D Mesh ◽  
Fine Grain ◽  
Grain Boundary Structure ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Effect of Nano-Y2O3 Addition on Microstructure and Tensile Properties of High-Nb TiAl Alloy Prepared by Spark Plasma Sintering

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1048
Author(s):  
Yingchao Guo ◽  
Yongfeng Liang ◽  
Junpin Lin ◽  
Fei Yang
Keyword(s):  
Tensile Strength ◽  
Spark Plasma Sintering ◽  
Tial Alloy ◽  
Second Phase ◽  
Fine Grain ◽  
Fine Grain Strengthening ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Y2o3 Addition ◽  
Powder Metallurgy Route

Nano-Y2O3 reinforced Ti-47.7Al-7.1Nb-(V, Cr) alloy was fabricated by a powder metallurgy route using spark plasma sintering (SPS), and the influence of nano-Y2O3 contents on the microstructure and mechanical properties were investigated systematically. The results revealed that the ultimate tensile strength and elongation of the alloy were 570 ± 28 MPa and 1.7 ± 0.6% at 800 °C, 460 ± 23 MPa and 6.1 ± 0.4% at 900 °C with no nano-Y2O3, 662 ± 24 MPa and 5.5 ± 0.5% at 800 °C, and 466 ± 25 MPa and 16.5 ± 0.8% at 900 °C with 0.05 at% nano-Y2O3 addition, respectively. Due to the fine-grain strengthening and the second-phase strengthening, both tensile strength and elongation of the high-Nb TiAl alloy were enhanced with the addition of nano-Y2O3.

Mechanical Property and Microstructure of Ti-Ta-Ag Alloy for Biomedical Applications

2012 ◽  
Vol 520 ◽  
pp. 254-259 ◽  
Author(s):  
Ming Wen ◽  
Cui E Wen ◽  
Peter D. Hodgson ◽  
Yun Cang Li
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Elastic Modulus ◽  
Spark Plasma Sintering ◽  
Biomedical Applications ◽  
High Hardness ◽  
Vacuum Sintering ◽  
Preparation Methods ◽  
Plasma Sintering ◽  
Spark Plasma

Ti and some of its alloys (e.g. Ti–6Al–4V alloy) have become the metals of choice for the endosseous parts of presently available dental implants. In the present study, Ti-Ta-Ag alloys with a different Ag content were prepared using vacuum sintering (VS) and spark plasma sintering (SPS) process. The microstructure and mechanical properties of the Ti-Ta-Ag alloys were investigated. The results show that dense Ti-Ta-Ag alloys prepared using the SPS process exhibit high hardness and a suitable elastic modulus for implant materials for load-bearing applications. The effect of preparation methods on the microstructure of Ti-Ta-Ag alloys is discussed.

Fabrication of Dense Nanostructured Bulk Ceramics by Means of Spark-Plasma-Sintering (SPS) Processing

2016 ◽  
Vol 838-839 ◽  
pp. 225-230 ◽  
Author(s):  
Koji Morita ◽  
Byung Nam Kim ◽  
Hidehiro Yoshida ◽  
Keijiro Hiraga ◽  
Yoshio Sakka
Keyword(s):  
Heating Rate ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
High Heating Rate ◽  
Fine Grained ◽  
Fine Grain ◽  
Plasma Sintering ◽  
High Heating ◽  
Spark Plasma ◽  
Primary Advantage

In order to fabricate fine-grained and dense nanoceramic materials, the effect of spark-plasma-sintering (SPS) conditions was examined in MgAl2O4 spinel as a reference material. The SPS conditions, such as heating rate and loading temperature, strongly affected the microstructures. Although the density can be improved with decreasing the heating rate to less than 10 °C/min, it requires a long processing time. In order to fully utilize the high heating rate that is a primary advantage of the SPS technique, load controlling is very effective to achieve high density with maintaining fine grain size. An increase in the loading temperature during SPS processing can reduce the residual porosity in a spinel even at the widely used high heating rate of 100 °C/min. This suggests that for the SPS processing in ceramics, the load controlling is an important factor as well as the heating rate and sintering temperature.

scholarly journals Flash Spark Plasma Sintering of 3YSZ: Modified Sintering Pathway and Impact on Grain Boundary Formation

2021 ◽  
Author(s):  
Thomas Hérisson de Beauvoir ◽  
Zakaria Ghomari ◽  
Geoffroy Chevallier ◽  
Andréas Flaureau ◽  
Alicia Weibel ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Spark Plasma Sintering ◽  
Boundary Formation ◽  
Plasma Sintering ◽  
Spark Plasma

Grain boundary diffusion driven spark plasma sintering of nanocrystalline zirconia

2012 ◽  
Vol 38 (5) ◽  
pp. 4385-4389 ◽  
Author(s):  
Hanna Borodianska ◽  
Dmytro Demirskyi ◽  
Yoshio Sakka ◽  
Petre Badica ◽  
Oleg Vasylkiv
Keyword(s):  
Grain Boundary ◽  
Spark Plasma Sintering ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Nanocrystalline Zirconia

scholarly journals High Speed Steel with Iron Addition Materials Sintered by Spark Plasma Sintering

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1549
Author(s):  
Marcin Madej ◽  
Beata Leszczyńska-Madej ◽  
Dariusz Garbiec
Keyword(s):  
Spark Plasma Sintering ◽  
High Speed ◽  
Sintering Temperature ◽  
Microstructural Analysis ◽  
High Speed Steel ◽  
High Hardness ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Powder Addition ◽  
Sintered Materials

Attempts were made to describe the effect of the sintering temperature and pure iron powder addition on the properties of high speed steel based materials produced by the spark plasma sintering technique. After sintering, their density, hardness, flexural strength, and tribological properties were determined. The sintered materials were also subjected to microstructural analysis in order to determine the phenomena occurring at the particle contact boundaries during sintering. Based on the analysis of the obtained results, it was found that the mechanical properties and microstructure were mainly influenced by the sintering temperature. Using the temperature of 1000 °C allowed materials with a density close to the theoretical density to be obtained, characterized by a high hardness of about 360 HB and a low wear rate of about 1E-07 g/s.

scholarly journals Refractory CrMoNbWV High-Entropy Alloy Manufactured by Mechanical Alloying and Spark Plasma Sintering: Evolution of Microstructure and Properties

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 621
Author(s):  
Nikolay Razumov ◽  
Tagir Makhmutov ◽  
Artem Kim ◽  
Boris Shemyakinsky ◽  
Aleksey Shakhmatov ◽  
...  
Keyword(s):  
Solid Solution ◽  
Spark Plasma Sintering ◽  
High Hardness ◽  
High Entropy Alloy ◽  
Mechanically Alloyed ◽  
Laves Phases ◽  
High Entropy ◽  
Electrochemical Tests ◽  
Plasma Sintering ◽  
Spark Plasma

In this study, bulk samples of a CrMoNbWV high-entropy alloy (HEA) were obtained for the first time by spark plasma sintering (SPS) of mechanically alloyed (MA) powders at 1200 °C, 1300 °C, and 1400 °C. Microstructure evolution, phase formation as well as wear and corrosion behavior were investigated. The MA powders’ phase composition was found to be represented by body-centered-cubic (BCC) solid solution. The solid solution partially decomposed to Laves phases under the sintering, such as Cr2Nb and (Fe, Cr)Nb, and NbVO4-VO oxides mixture. The temperature increase to 1400 °C led to a grain coarsening of the BCC phase and decreased the Laves phase content accompanied by precipitation at the grain boundaries. The sintered samples showed high hardness and compressive strength (2700–2800 MPa) at room temperature. The wear tests demonstrated excellent results in comparison to conventional wear-resistant composites. The obtained samples also exhibited high corrosion resistance under electrochemical tests in H2SO4 solution. The CrMoNbWV HEA has comparable mechanical and corrosive properties with the WNbMoTaV type HEA, but at the same time has a reduced density: CrMoNbWV—10.55 g/cm3, WNbMoTaV—12.42 g/cm3.

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