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.

Microstructures and mechanical properties of TiAl alloy fabricated by spark plasma sintering

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040036
Author(s):  
Yongjun Su ◽  
Yunfeng Lin ◽  
Na Zhang ◽  
Deliang Zhang
Keyword(s):  
Mechanical Properties ◽  
Spark Plasma Sintering ◽  
Alloy Powder ◽  
Room Temperature ◽  
Tial Alloy ◽  
Sintering Temperature ◽  
Tensile Tests ◽  
Alloyed Powder ◽  
Plasma Sintering ◽  
Spark Plasma

This work deals with the consolidation of a TiAl alloy powder by spark plasma sintering (SPS). Pre-alloyed powder with a composition of Ti–48Al–2Cr–2Nb (at.%) was consolidated in a SPS furnace at temperatures between 1200[Formula: see text]C and 1325[Formula: see text]C and with a pressure of 50 MPa. The microstructures obtained after SPS depend on the sintering temperature. Tensile tests at room temperature were performed. The alloy SPSed at temperatures not less than 1250[Formula: see text]C exhibits good properties at room temperature.

scholarly journals Microstructure and Mechanical Properties of AA7075 Aluminum Alloy Fabricated by Spark Plasma Sintering (SPS)

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 430
Author(s):  
Elder Soares ◽  
Nadège Bouchonneau ◽  
Elizeth Alves ◽  
Kleber Alves ◽  
Oscar Araújo Filho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Spark Plasma Sintering ◽  
Weight Ratio ◽  
Milled Powder ◽  
Uniaxial Pressure ◽  
Plasma Sintering ◽  
Technology Applications ◽  
Spark Plasma ◽  
Size And Morphology

AA7075 aluminum alloy is widely used for several high-technology applications for its high mechanical strength to weight ratio but is still the subject of several studies seeking a further increase in its mechanical properties. A commercial powder is used, either as-received or after ball-milling. Dense AA7075 samples are prepared in one step by Spark Plasma Sintering, at 550 °C with a holding time of 15 min and a uniaxial pressure of 100 MPa. No additional heat treatment is performed. Laser granulometry, X-ray diffraction and optical- and scanning electron microscopy show that both grain size and morphology are preserved in the dense samples, due to the relatively low temperature and short sintering time used. The samples prepared using the ball-milled powder exhibit both higher Vickers microhardness and transverse fracture strength values than those prepared using the raw powder, reflecting the finer microstructure.

scholarly journals Corrosion and mechanical properties of a novel biomedical WN43 magnesium alloy prepared by spark plasma sintering

2021 ◽  
Author(s):  
Michal Knapek ◽  
Mária Zemková ◽  
Adam Greš ◽  
Eva Jablonská ◽  
František Lukáč ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Influence of Sintering Process Conditions on Microstructural and Mechanical Properties of Boron Carbide Ceramics Synthesized by Spark Plasma Sintering

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1100
Author(s):  
Yingying Liu ◽  
Sheng Ge ◽  
Yihua Huang ◽  
Zhengren Huang ◽  
Deku Zhang
Keyword(s):  
Mechanical Properties ◽  
Boron Carbide ◽  
Spark Plasma Sintering ◽  
Mechanical Performance ◽  
Electron Backscatter Diffraction ◽  
Holding Time ◽  
Process Conditions ◽  
Sintering Process ◽  
Plasma Sintering ◽  
Spark Plasma

Boron carbide (B4C) ceramics were synthesized by spark plasma sintering at a temperature between 1600 and 2050 °C without employing any sintering additives. The effect of sintering process parameters, such as temperature, holding time, pressure, hearting rate, and pulsed electric current, and the particle size of the raw powder on the densification behavior and mechanical properties of B4C ceramics, were comprehensively and systematically investigated. Hardness and fracture toughness of B4C that has a density close to the theoretical value were found to be 33.5 ± 0.2 GPa and 3.21 ± 0.13 MPa·m1/2, respectively. Electron backscatter diffraction (EBSD) analysis revealed no abnormal growth of grains due to an increase in holding time and pressure. Twin structures present in ceramics are beneficial for their mechanical performance.

scholarly journals Mechanical properties of WN43 magnesium alloy prepared by spark plasma sintering

2019 ◽  
Author(s):  
Michal KNAPEK ◽  
Peter MINÁRIK ◽  
Adam GREŠ ◽  
Mária ZEMKOVÁ ◽  
Jakub CINERT ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Magnesium Alloy ◽  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Phases, Microstructures and Mechanical Properties of CoCrNiCuZn High-Entropy Alloy Prepared by Mechanical Alloying and Spark Plasma Sintering

Entropy ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 122 ◽  
Author(s):  
Yuchen Sun ◽  
Boren Ke ◽  
Yulin Li ◽  
Kai Yang ◽  
Mingqi Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Spark Plasma Sintering ◽  
Alloy Powder ◽  
High Entropy Alloy ◽  
Face Centered Cubic ◽  
High Entropy ◽  
Plasma Sintering ◽  
Different Temperatures ◽  
Spark Plasma

In the study, an equiatomic CoCrNiCuZn high-entropy alloy (HEA) was prepared by mechanical alloying (MA) and the phases, microstructures, and thermal properties of the alloy powder were explored. The results suggest that a solid solution with body-centered cubic (BCC) phase and a crystalline size of 10 nm formed after 60 h of milling. Subsequently, the alloy powder was consolidated by spark plasma sintering (SPS) at different temperatures (600 °C, 700 °C, 800 °C, and 900 °C). Two kinds of face-centered cubic (FCC) phases co-existed in the as-sintered samples. Besides, Vickers hardness and compressive strength of the consolidated alloy sintered at 900 °C were respectively 615 HV and 2121 MPa, indicating excellent mechanical properties.

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