scholarly journals The Influence of Powder Milling on Properties of SPS Compacted FeAl

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2263
Author(s):  
Alena Michalcová ◽  
Murat Özkan ◽  
Pavol Mikula ◽  
Ivo Marek ◽  
Anna Knaislová ◽  
...  
Keyword(s):  
Structural Parameters ◽  
Milled Powder ◽  
Milling Process ◽  
Al Alloy ◽  
Powder Materials ◽  
Initial Powder ◽  
Bulk Materials ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Size And Morphology

The Fe-28 at.% Al alloy was studied in this article. The aim was to describe the influence of gas atomized powder pre-milling before SPS (Spark Plasma Sintering) sintering on the structure and properties of the bulk materials. The initial powder was milled for 0.5, 1, and 8 h. It was proven that 1 h milling leads to the change in size and morphology of the particles, B2→A2 phase transformation, and to the contamination with the material from a milling vessel. Powder materials were compacted by the SPS process at 900, 1000, and 1100 °C. The differences between the bulk materials were tested by LM, SEM, and TEM microscopy, XRD, and neutron diffraction methods. It was proven that, although the structures of initial powder (B2) and milled powder (A2) were different, both provide after-sintering material with the same structure (D03) with similar structural parameters. Higher hardness and improved ductility of the material sintered from the milled powder are likely caused by the change in chemical composition during the milling process.

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.

Spark Plasma Sintering of Cryomilled Nanocrystalline Al Alloy - Part I: Microstructure Evolution

2011 ◽  
Vol 43 (1) ◽  
pp. 327-339 ◽  
Author(s):  
Yuhong Xiong ◽  
Dongming Liu ◽  
Ying Li ◽  
Baolong Zheng ◽  
Chris Haines ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Microstructure Evolution ◽  
Al Alloy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Alloy Part

Production of Dispersion-Strengthened Cu-TiB2 Alloys by Ball-Milling and Spark-Plasma Sintering

2007 ◽  
Vol 534-536 ◽  
pp. 1489-1492 ◽  
Author(s):  
Dae Hwan Kwon ◽  
Jong Won Kum ◽  
Thuy Dang Nguyen ◽  
Dina V. Dudina ◽  
Pyuck Pa Choi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Ball Milling ◽  
Spark Plasma Sintering ◽  
Ball Mill ◽  
Milling Time ◽  
Rotation Speed ◽  
Sintering Temperature ◽  
Milled Powder ◽  
Plasma Sintering ◽  
Spark Plasma

Dispersion-strengthened copper with TiB2 was produced by ball-milling and spark plasma sintering (SPS).Ball-milling was performed at a rotation speed of 300rpm for 30 and 60min in Ar atmosphere by using a planetary ball mill (AGO-2). Spark-plasma sintering was carried out at 650°C for 5min under vacuum after mechanical alloying. The hardness of the specimens sintered using powder ball milled for 60min at 300rpm increased from 16.0 to 61.8 HRB than that of specimen using powder mixed with a turbular mixer, while the electrical conductivity varied from 93.40% to 83.34%IACS. In the case of milled powder, hardness increased as milling time increased, while the electrical conductivity decreased. On the other hand, hardness decreased with increasing sintering temperature, but the electrical conductiviey increased slightly

Performance Analysis of Silver-Based Graphene Nanocomposite Bulk Materials Obtained by Spark Plasma Sintering

JOM ◽  
2018 ◽  
Vol 71 (2) ◽  
pp. 541-547 ◽  
Author(s):  
Hui Zhang ◽  
Xianhui Wang ◽  
Yapeng Li ◽  
Changsheng Guo ◽  
Changming Zhang
Keyword(s):  
Performance Analysis ◽  
Spark Plasma Sintering ◽  
Bulk Materials ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Graphene Nanocomposite

Challenges of nanostructuring and functional properties for selected bulk materials obtained by reactive spark plasma sintering

2014 ◽  
Vol 53 (5S1) ◽  
pp. 05FB22 ◽  
Author(s):  
Petre Badica ◽  
Gheorghe V. Aldica ◽  
Mihail Burdusel ◽  
Hanna Borodianska ◽  
Yoshio Sakka ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Functional Properties ◽  
Bulk Materials ◽  
Plasma Sintering ◽  
Spark Plasma

High-performance Ag0.8Pb18+xSbTe20 thermoelectric bulk materials fabricated by mechanical alloying and spark plasma sintering

2006 ◽  
Vol 88 (9) ◽  
pp. 092104 ◽  
Author(s):  
Heng Wang ◽  
Jing-Feng Li ◽  
Ce-Wen Nan ◽  
Min Zhou ◽  
Weishu Liu ◽  
...  
Keyword(s):  
Mechanical Alloying ◽  
Spark Plasma Sintering ◽  
High Performance ◽  
Bulk Materials ◽  
Plasma Sintering ◽  
Spark Plasma

Characteristic and Sinterability of Alumina-Zirconia-Yttria Nanoparticles Prepared by Different Chemical Methods

2014 ◽  
Vol 87 ◽  
pp. 30-35
Author(s):  
Janis Grabis ◽  
Dzidra Jankovica ◽  
Ints Steins ◽  
Krisjanis Smits ◽  
Inta Sipola
Keyword(s):  
Phase Transition ◽  
Spark Plasma Sintering ◽  
Molten Salts ◽  
Preparation Method ◽  
Bulk Materials ◽  
Chemical Methods ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
The Impact ◽  
Sintering Method

The characteristics and sinterability of the Al2O3-ZrO2(Y2O3) nanoparticles produced by simple and effective microwave and molten salts methods and processed by using spark plasma sintering were studied and compared. The crystalline powders with the specific surface area in the range of 72–108 m2/g and crystallite size of 5–13 nm were obtained by calcination of samples prepared by both methods at 800 °C. The content of t-ZrO2 phase depends on concentration of Al2O3, Y2O3 and on calcination temperature but the impact of the preparation method is insignificant. The phase transition of tetragonal ZrO2 to monoclinic for the samples without Y2O3 started at 1000 °C though it was incomplete in the case of high content of Al2O3. The bulk materials with relative density of 86.1–98.7% were fabricated by the spark plasma sintering method at 1500–1600 °C depending on the content of Al2O3 and Y2O3.

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