Publication detail
Preparation of Mg-Al-Ti bulk materials via powder metallurgy
BRESCHER, R. BŘEZINA, M.
Original Title
Preparation of Mg-Al-Ti bulk materials via powder metallurgy
Type
abstract
Language
English
Original Abstract
Bulk materials based on the Mg–Al–Ti system were prepared using traditional methods of powder metallurgy, as well as using the sprak plasma sintering (SPS) method. The microstructure of the material, elemental and phase composition was examined. Subsequently, Vickers hardness and flexural strength were measured, and fractographic observation of the fracture surface was performed. It was found that the aluminum was completely dissolved during sintering and subsequent heat treatment, but the titanium particles remained almost intact in the material and worked as a particulate reinforcement. X–ray diffraction spectroscopy detected multiple phases, such as magnesium phase β, magnesium–aluminum solid solution, pure titanium, and titanium nitride. Titanium nitride could be formed because of the reaction of titanium and the nitrogen atmosphere used during sintering. Materials prepared by methods of conventional powder metallurgy showed increased porosity compared to materials prepared by the SPS, resulting in lower hardness and flexural strength. This phenomenon could be caused by Kirkendall effect, where aluminum diffused into magnesium faster than magnesium into aluminum. The hardness increased with increasing the amount of aluminum and titanium and with the amount of magnesium phase β. Fractographic observation of the fracture surface showed, that titanium particles held firmly in the matrix even after formation of crack, which in some cases passed through the titanium particle itself. This fact might suggest that a diffuse connection between the reinforcement and the matrix may have occurred after the sintering process.
Keywords
magnesium alloys, aluminium, titanium, spark plasma sintering, hardness, flexural strength
Authors
BRESCHER, R.; BŘEZINA, M.
Released
27. 11. 2020
Publisher
Vysoké učení technické v Brně, Fakulta chemická, Purkyňova 464/118, 612 00 Brno
Location
Brno
ISBN
978-80-214-5920-0
Book
Studentská odborná konference - CHEMIE JE ŽIVOT - sborník abstraktů
Edition number
první
Pages from
52
Pages to
53
Pages count
2
URL
BibTex
@misc{BUT169259,
author="Roman {Brescher} and Matěj {Březina}",
title="Preparation of Mg-Al-Ti bulk materials via powder metallurgy",
booktitle="Studentská odborná konference - CHEMIE JE ŽIVOT - sborník abstraktů",
year="2020",
edition="první",
pages="52--53",
publisher="Vysoké učení technické v Brně, Fakulta chemická, Purkyňova 464/118, 612 00 Brno",
address="Brno",
isbn="978-80-214-5920-0",
url="https://www.fch.vut.cz/vav/konference/sok/vystupy/sbornik-abstrakty-konference-2020-pdf-p198641",
note="abstract"
}