A TiAl based alloy with excellent mechanical performance prepared by gas atomization and spark plasma sintering

2012 ◽  
Vol 31 ◽  
pp. 202-207 ◽  
Author(s):  
Yongjiang Huang ◽  
Yu Wang ◽  
Hongbo Fan ◽  
Jun Shen
Keyword(s):  
Spark Plasma Sintering ◽  
Mechanical Performance ◽  
Gas Atomization ◽  
Plasma Sintering ◽  
Spark Plasma

Discharge Enhancement Effect of Inorganic Nanometer Spark Plasma Sintering Aid

2016 ◽  
Vol 850 ◽  
pp. 829-834
Author(s):  
Hao Feng Li ◽  
Ming Gang Wang ◽  
Zhan Kui Zhao
Keyword(s):  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Physical Method ◽  
Silicon Steel ◽  
Enhancement Effect ◽  
Gas Atomization ◽  
Sintering Aid ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Powder Particles

CaF2 inorganic nanometer powder particles were used as sintering aid to sintering good conductive Fe-6.5Si alloy. By a physical method, CaF2 inorganic nanopowder particles were made with a granularity of 15-30 nm assembled between micron-sized Fe-6.5Si powder particles prepared by gas atomization. 6.5 % Si high silicon steel were fabricated by spark plasma sintering (SPS) with varying contents of CaF2. The discharge enhancement effect of CaF2 inorganic nanospark plasma aid is confirmed. The initial sintering temperature and the final sintering temperature were decreased by 75 °C and 70 °C respectively with 0.5 % CaF2 inorganic nanopowder aid. In the case of reduced 60 °C, the higher density for the particles with the addition of CaF2 was observed compared with without CaF2. When the nanopowder was 2%, sintering performance decreased. The study indicates that sintering pressure has an enormous effect on the Fe-6.5Si sintering effect.

Microstructure and Mechanical Properties of Mg-Zn-Y Alloys Fabricated by Rapid Solidification and Spark Plasma Sintering Processes

2007 ◽  
Vol 124-126 ◽  
pp. 1517-1520 ◽  
Author(s):  
Hyeon Taek Son ◽  
J.M. Hong ◽  
Ik Hyun Oh ◽  
Jae Seol Lee ◽  
T.S. Kim ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Compressive Yield Strength ◽  
Gas Atomization ◽  
Atomization Process ◽  
Maximum Value ◽  
Alloy Particles ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Processes

Mg97Zn1Y2 alloy powders were prepared from gas atomization process, followed by consolidation using spark plasma sintering (SPS) process. The atomized Mg97Zn1Y2 alloy particles were entirely spherical in shape and dendrite microstructure. The compacts sintered by SPS process have values more than 99% of theoretical density. The compressive yield strength was decreased as sintering temperature increased. It is found that the compressive strength showed the maximum value of 303MPa at the sintered specimen under load of 250MPa at 350°C.

scholarly journals Effect of Short Attritor-Milling of Magnesium Alloy Powder Prior to Spark Plasma Sintering

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 3973
Author(s):  
Peter Minárik ◽  
Mária Zemková ◽  
Michal Knapek ◽  
Stanislav Šašek ◽  
Jan Dittrich ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Spark Plasma Sintering ◽  
Alloy Powder ◽  
Mechanical Performance ◽  
Milled Powder ◽  
Plasma Sintering ◽  
Attritor Milling ◽  
Spark Plasma ◽  
Superior Mechanical Properties

The spark plasma sintering (SPS) technique was employed to prepare compacts from (i) gas-atomized and (ii) attritor-milled AE42 magnesium powder. Short attritor-milling was used mainly to disrupt the MgO shell covering the powder particles and, in turn, to enhance consolidation during sintering. Compacts prepared by SPS from the milled powder featured finer microstructures than compacts consolidated from gas-atomized powder (i.e., without milling), regardless of the sintering temperatures in the range of 400–550 °C. Furthermore, the grain growth associated with the increase in the sintering temperature in these samples was less pronounced than in the samples prepared from gas-atomized particles. Consequently, the mechanical properties were significantly enhanced in the material made of milled powder. Apart from grain refinement, the improvements in mechanical performance were attributed to the synergic effect of the irregular shape of the milled particles and better consolidation due to effectively disrupted MgO shells, thus suppressing the crack formation and propagation during loading. These results suggest that relatively short milling of magnesium alloy powder can be effectively used to achieve superior mechanical properties during consolidation by SPS even at relatively low temperatures.

scholarly journals The Influence of Wire Electrical Discharge Machining Cutting Parameters on the Surface Roughness and Flexural Strength of ZrO2/TiN Ceramic Nanocomposites Obtained by Spark Plasma Sintering

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1391 ◽  
Author(s):  
Anton Smirnov ◽  
Anton Seleznev ◽  
Nestor Washington Solís Pinargote ◽  
Yuri Pristinskiy ◽  
Pavel Peretyagin ◽  
...  
Keyword(s):  
Flexural Strength ◽  
Spark Plasma Sintering ◽  
Electrical Discharge ◽  
Mechanical Performance ◽  
Electrical Discharge Machining ◽  
Homogeneous Distribution ◽  
Wire Electrical Discharge Machining ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Ceramic Nanocomposites

In this work, we characterized the mechanical and electrical properties of zirconia-based ceramic nanocomposites reinforced with 30 and 40 vol. % TiN and fabricated by spark plasma sintering. In addition to their improved mechanical performance, these compositions have sufficient electrical conductivity to allow wire electrical discharge machining (WEDM). The influence of WEDM variables on the roughness and the mechanical strength of samples was analyzed after each cut. The experimental results showed that the roughness of machined surfaces can be reduced by variations in WEDM manufacturing regimes, and, consequently, a drastic drop in flexural strength of workpieces can be avoided. Furthermore, the composites with higher content and homogeneous distribution of the conductive phase exhibited better surface quality as well.

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