Abstract
The paper explores the influence of planetary milling on the temperature and velocity of Al-Ti-B powder mixture combustion and also on the structure and phase composition of the reaction products. It is found that the time increase of planetary milling modifies the structure of the powder particles, improves the density of compacted specimens, and increases the temperature and velocity of their combustion. These time dependences are extreme, with maximum values during 180 s planetary milling. Experiments show that the reaction products consist of an aluminum matrix with uniformly distributed particles of titanium diboride of not over 1 µm in size. The average particle size changes with the increase in the time of the planetary milling of the initial powder mixture.
Highlights
Al-TiB2 composites obtained by self-propagating high-temperature synthesis (SHS) or combustion synthesis of Al-Ti-B powder mixture have a high potential to be applied in automobile and aerospace industries [1,2,3]
In previous research [9], we show that the addition of 1 wt.% TiB2 in the melt of the grade AD35 aluminum alloy reduces the particle size in the fabricated products from 620 to 220 μm and increases their ultimate tensile strength from 100 to 145 MPa
Lamellar composites were formed after planetary milling of the Al-Ti-B mixture
Summary
Al-TiB2 composites obtained by self-propagating high-temperature synthesis (SHS) or combustion synthesis of Al-Ti-B powder mixture have a high potential to be applied in automobile and aerospace industries [1,2,3]. As is known, titanium diboride (TiB2 ) particles are effective nucleators, allowing the fabrication of products with a fine-grain structure [4,5,6,7,8,9,10]. The combustion temperature and velocity, modifies the structure of obtained materials [8] It is shown [9,10] that, with an increasing content of Al powder in the initial Al-Ti-B powder mixture, the temperature and the velocity of combustion are reduced, resulting in TiB2 particle size reduction in the obtained materials
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
