Preparation of red nitride phosphor from powder mixture of metal nitrides using spark plasma sintering

2014 ◽  
Vol 14 (8) ◽  
pp. 1051-1056 ◽  
Author(s):  
Hung Quang Trinh ◽  
Jin Oh Jo ◽  
Sang Baek Lee ◽  
Young Sun Mok
Keyword(s):  
Spark Plasma Sintering ◽  
Powder Mixture ◽  
Metal Nitrides ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals B6O ceramic by in-situ reactive spark plasma sintering of a B2O3 and B powder mixture

2014 ◽  
Vol 122 (1425) ◽  
pp. 336-340 ◽  
Author(s):  
Ievgen SOLODKYI ◽  
Hanna BORODIANSKA ◽  
Ting ZHAO ◽  
Yoshio SAKKA ◽  
Petre BADICA ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Powder Mixture ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Fabrication of Cu-Based SiC Composites by Spark Plasma Sintering of Cu-Nitrate Coated SiC Powders

2017 ◽  
Vol 62 (2) ◽  
pp. 1407-1410
Author(s):  
Y.-K. Jeong ◽  
Y.S. Kim ◽  
S.-T. Oh
Keyword(s):  
Spark Plasma Sintering ◽  
Powder Mixture ◽  
Powder Processing ◽  
Sem Analysis ◽  
Homogeneous Microstructure ◽  
Dense Microstructure ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sic Composites

AbstractAn optimum route to fabricate the Cu-based SiC composites with homogeneous microstructure was investigated. Three methods for developing the densified composites with sound interface between Cu and SiC were compared on the basis of the resulting microstructures. Starting with three powder mixtures of elemental Cu and SiC, elemental Cu and PCS coated SiC or PCS and Cunitrate coated SiC was used to obtain Cu-based SiC composites. SEM analysis revealed that the composite fabricated by spark plasma sintering using elemental SiC and Cu powder mixture showed inhomogeneous microstructure. Conversely, dense microstructure with sound interface was observed in the sintered composites using powder mixture of pre-coated PCS and Cu-nitrate onto SiC. The relationship between powder processing and microstructure was discussed based on the role of coating layer for the wettability

scholarly journals Synthesis and Characterization of a Nearly Single Bulk Ti2AlN MAX Phase Obtained from Ti/AlN Powder Mixture through Spark Plasma Sintering

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2217
Author(s):  
Christopher Salvo ◽  
Ernesto Chicardi ◽  
Rosalía Poyato ◽  
Cristina García-Garrido ◽  
José Antonio Jiménez ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Powder Mixture ◽  
Outer Zone ◽  
Max Phase ◽  
Molar Ratio ◽  
Potential Candidate ◽  
Max Phases ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Ternary Carbides

MAX phases are an advanced class of ceramics based on ternary carbides or nitrides that combine some of the ceramic and metallic properties, which make them potential candidate materials for many engineering applications under severe conditions. The present work reports the successful synthesis of nearly single bulk Ti2AlN MAX phase (>98% purity) through solid-state reaction and from a Ti and AlN powder mixture in a molar ratio of 2:1 as starting materials. The mixture of Ti and AlN powders was subjected to reactive spark plasma sintering (SPS) under 30 MPa at 1200 °C and 1300 °C for 10 min in a vacuum atmosphere. It was found that the massive formation of Al2O3 particles at the grain boundaries during sintering inhibits the development of the Ti2AlN MAX phase in the outer zone of the samples. The effect of sintering temperature on the microstructure and mechanical properties of the Ti2AlN MAX phase was investigated and discussed.

scholarly journals Study of the Influence of Sintering Atmosphere and Mechanical Activation on the Synthesis of Bulk Ti2AlN MAX Phase Obtained by Spark Plasma Sintering

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4574
Author(s):  
Christopher Salvo ◽  
Ernesto Chicardi ◽  
Cristina García-Garrido ◽  
Rosalía Poyato ◽  
José A. Jiménez ◽  
...  
Keyword(s):  
Mechanical Activation ◽  
Spark Plasma Sintering ◽  
Powder Mixture ◽  
Max Phase ◽  
Activation Process ◽  
X Ray Diffraction ◽  
Sintering Atmosphere ◽  
X Ray ◽  
Plasma Sintering ◽  
Spark Plasma

The influence of the mechanical activation process and sintering atmosphere on the microstructure and mechanical properties of bulk Ti2AlN has been investigated. The mixture of Ti and AlN powders was prepared in a 1:2 molar ratio, and a part of this powder mixture was subjected to a mechanical activation process under an argon atmosphere for 10 h using agate jars and balls as milling media. Then, the sintering and production of the Ti2AlN MAX phase were carried out by Spark Plasma Sintering under 30 MPa with vacuum or nitrogen atmospheres and at 1200 °C for 10 min. The crystal structure and microstructure of consolidated samples were characterized by X-Ray Diffraction, Scanning Electron Microscopy, and Energy Dispersive X-Ray Spectroscopy. The X-ray diffraction patterns were fitted using the Rietveld refinement for phase quantification and determined their most critical microstructural parameters. It was determined that by using nitrogen as a sintering atmosphere, Ti4AlN3 MAX phase and TiN were increased at the expense of the Ti2AlN. In the samples prepared from the activated powders, secondary phases like Ti5Si3 and Al2O3 were formed. However, the higher densification level presented in the sample produced by using both nitrogen atmosphere and MAP powder mixture is remarkable. Moreover, the high-purity Ti2AlN zone of the MAX-1200 presented a hardness of 4.3 GPa, and the rest of the samples exhibited slightly smaller hardness values (4.1, 4.0, and 4.2 GPa, respectively) which are matched with the higher porosity observed on the SEM images.

scholarly journals Phase formation at the Ti2AlN under the spark-plasma sintering in the Ti/AlN system

2018 ◽  
pp. 49-53
Author(s):  
V. G. Gilev ◽  
M. N. Kachenyuk
Keyword(s):  
Phase Composition ◽  
Mechanical Activation ◽  
Spark Plasma Sintering ◽  
Phase Formation ◽  
Powder Mixture ◽  
Planetary Mill ◽  
Phase Ratio ◽  
Mass Percent ◽  
Plasma Sintering ◽  
Spark Plasma

The synthesis of the Ti2AlN-based material by means of the mechanical activation (MA) of the Ti‒AlN powder mixture in the planetary mill followed by the vacuum spark-plasma sintering (SPS). It was shown that the phase ratio AlN/Ti gradually decreases under mechanical activation. The data are given on the sample's phase composition, density and hardness after the SPS. The maximum Ti2AlN content value of 90 mass percent was achieved at the SPS temperature 1300 °C. The samples had the lowest porosity value of 1,9 % at the SPS temperature 1200‒1300 °C, the HV0,5hardness being close to 7 GPa.

Densification and alloying of ball milled Silicon-Germanium powder mixture during spark plasma sintering

2017 ◽  
Vol 28 (2) ◽  
pp. 506-513 ◽  
Author(s):  
R. Murugasami ◽  
P. Vivekanandhan ◽  
S. Kumaran ◽  
R. Suresh Kumar ◽  
T. John Tharakan
Keyword(s):  
Spark Plasma Sintering ◽  
Powder Mixture ◽  
Silicon Germanium ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Germanium Powder
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