Next Article in Journal
Heavy Metal Behavior in Lichen-Mine Waste Interactions at an Abandoned Mine Site in Southwest Japan
Next Article in Special Issue
Effect of Ceramic Content on the Compression Properties of TiB2-Ti2AlC/TiAl Composites
Previous Article in Journal
Chalcopyrite Dissolution at 650 mV and 750 mV in the Presence of Pyrite
Article Menu

Export Article

Open AccessArticle
Metals 2015, 5(3), 1580-1590; doi:10.3390/met5031580

Experimental and Numerical Studies on Self-Propagating High-Temperature Synthesis of Ta5Si3 Intermetallics

Department of Aerospace and Systems Engineering, Feng Chia University, Taichung 40724, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Ana Sofia Ramos
Received: 11 August 2015 / Revised: 21 August 2015 / Accepted: 28 August 2015 / Published: 1 September 2015
(This article belongs to the Special Issue Intermetallics 2016)
View Full-Text   |   Download PDF [1008 KB, uploaded 1 September 2015]   |  

Abstract

Formation of Ta5Si3 by self-propagating high-temperature synthesis (SHS) from elemental powder compacts of Ta:Si = 5:3 was experimentally and numerically studied. Experimental evidence showed that the increase of either sample density or preheating temperature led to the increase of combustion wave velocity and reaction temperature. The apparent activation energy, Ea ≈ 108 kJ/mol, was determined for the synthesis reaction. Based upon numerical simulation, the Arrhenius factor of the rate function, K0 = 2.5 × 107 s−1, was obtained for the 5Ta + 3Si combustion system. In addition, the influence of sample density on combustion wave kinetics was correlated with the effective thermal conductivity (keff) of the powder compact. By adopting 0.005 ≤ keff/kbulk ≤ 0.016 in the computation model, the calculated combustion velocity and temperature were in good agreement with experimental data of the samples with compaction densities between 35% and 45% theoretical maximum density (TMD). View Full-Text
Keywords: self-propagating high-temperature synthesis; Ta5Si3; numerical simulation; activation energy; Arrhenius factor; thermal conductivity self-propagating high-temperature synthesis; Ta5Si3; numerical simulation; activation energy; Arrhenius factor; thermal conductivity
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Yeh, C.-L.; Chou, C.-C.; Hwang, P.-W. Experimental and Numerical Studies on Self-Propagating High-Temperature Synthesis of Ta5Si3 Intermetallics. Metals 2015, 5, 1580-1590.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top