The oxidation of nanocrystalline Ni3Al fabricated by mechanical alloying and spark plasma sintering

The spark plasma sintering (SPS) microstructure and high temperature oxidation behavior of TiH2-45Al-0.2Si-5Nb(at.%) alloy were investigated.Emphasis was placed on the effect of SPS microstructures, obtained by blend powder and mechanical alloying powder. The mass gain due to oxidation was measured using an electro balance. The oxide layers as well as its micro-structure were examined by SEM and EDS, and XRD. The results show that sintered microstructure of blend powder is composed of fully lamellar TiAl/ Ti3Al phase, and that of the mechanical alloying powder is composed of finer granular TiAl/Ti3Al phase. The latter oxidation rate is lower, and forms continuous mixed oxide layer of Al2O3 and TiO2. Both SPS microstructure of blend powder and mechanical alloying powder are superior in oxidation behavior to ordinary vacuum sintering.

Download Full-text

Effect of the mechanical alloying on the Ti3SiC2 formation by spark plasma sintering from Ti/Si/C powders

International Journal of Refractory Metals and Hard Materials ◽

10.1016/j.ijrmhm.2012.05.011 ◽

2012 ◽

Vol 35 ◽

pp. 163-169 ◽

Cited By ~ 11

Author(s):

Houyem Abderrazak ◽

Faten Turki ◽

Fréderic Schoenstein ◽

Mohieddine Abdellaoui ◽

Noureddine Jouini

Keyword(s):

Mechanical Alloying ◽

Spark Plasma Sintering ◽

Plasma Sintering ◽

Spark Plasma

Download Full-text

Effects of the Sintering Conditions on the Mechanical Properties of Titanium-Carbide-Particle-Reinforced Magnesium Nanocomposites Fabricated by Mechanical Alloying/Mechanical Milling/Spark Plasma Sintering

Journal of the Japan Institute of Metals and Materials ◽

10.2320/jinstmet.j2018021 ◽

2018 ◽

Vol 82 (8) ◽

pp. 326-331

Author(s):

Shigehiro Kawamori ◽

Yoshihumi Kawashima ◽

Hiroshi Fujiwara ◽

Kiyoshi Kuroda ◽

Yukio Kasuga

Keyword(s):

Mechanical Properties ◽

Titanium Carbide ◽

Mechanical Alloying ◽

Spark Plasma Sintering ◽

Mechanical Milling ◽

Carbide Particle ◽

Plasma Sintering ◽

Spark Plasma ◽

Sintering Conditions

Download Full-text

Structure and Deformation Behavior of Ti-SiC Composites Made by Mechanical Alloying and Spark Plasma Sintering

Materials ◽

10.3390/ma12081276 ◽

2019 ◽

Vol 12 (8) ◽

pp. 1276 ◽

Cited By ~ 1

Author(s):

Dariusz Garbiec ◽

Volf Leshchynsky ◽

Alberto Colella ◽

Paolo Matteazzi ◽

Piotr Siwak

Keyword(s):

Mechanical Alloying ◽

Spark Plasma Sintering ◽

Indentation Size Effect ◽

Sintering Temperature ◽

High Energy ◽

Indentation Size ◽

X Ray ◽

Plasma Sintering ◽

Spark Plasma ◽

Energy Ball

Combining high energy ball milling and spark plasma sintering is one of the most promising technologies in materials science. The mechanical alloying process enables the production of nanostructured composite powders that can be successfully spark plasma sintered in a very short time, while preserving the nanostructure and enhancing the mechanical properties of the composite. Composites with MAX phases are among the most promising materials. In this study, Ti/SiC composite powder was produced by high energy ball milling and then consolidated by spark plasma sintering. During both processes, Ti3SiC2, TiC and Ti5Si3 phases were formed. Scanning electron microscopy, energy-dispersive X-ray spectroscopy and X-ray diffraction study showed that the phase composition of the spark plasma sintered composites consists mainly of Ti3SiC2 and a mixture of TiC and Ti5Si3 phases which have a different indentation size effect. The influence of the sintering temperature on the Ti-SiC composite structure and properties is defined. The effect of the Ti3SiC2 MAX phase grain growth was found at a sintering temperature of 1400–1450 °C. The indentation size effect at the nanoscale for Ti3SiC2, TiC+Ti5Si3 and SiC-Ti phases is analyzed on the basis of the strain gradient plasticity theory and the equation constants were defined.

Download Full-text