PT  - JOURNAL ARTICLE
AU  - Knaislová, Anna
AU  - Novák, Pavel
AU  - Průša, Filip
TI  - Preparation of Ti-Al-Si Alloys by Powder Metallurgy
DP  - 2016 Dec 1
TA  - Manufacturing Technology Journal
PG  - 1274--1278
VI  - 16
IP  - 6
AID - 10.21062/ujep/x.2016/a/1213-2489/MT/16/6/1274
IS  - 12132489
AB  - Ti-Al-Si alloys are very prospective materials for many applications, particularly for automotive and aerospace industry, due to their low density, excellent resistivity to oxidation and heat stability. The main problem is high brittleness at room temperature and high mechanical characteristics persisting only up to 800 °C, which is limiting in some applications. Ti-Al-Si alloys were prepared by powder metallurgy using Self-propagating High-temperature Synthesis (SHS), which is considered as a first step in production consisting of SHS, milling and consolidation by Spark Plasma Sintering. In this experiment the observed subject was the microstructure and phase composition of Ti-Al-Si alloys in order to find optimum alloy composition for desired technology. Based on the results of this work, TiAl15Si15 alloy can be recommended due to fine microstructure composed of titanium silicide (Ti5Si3) particles in the matrix of titanium aluminide (TiAl). Concerning the production by SHS, the highest achievable heating rate can be recommended.