RT Journal Article
SR Electronic
A1 Knaislová, Anna
A1 Šimůnková, Vendula
A1 Novák, Pavel
A1 Průša, Filip
T1 High-Temperature Behaviour of Ti-Al-Si Alloys Prepared by Spark Plasma Sintering
JF Manufacturing Technology Journal
YR 2017
VO 17
IS 5
SP 733
OP 738
DO 10.21062/ujep/x.2017/a/1213-2489/MT/17/5/733
UL https://journalmt.com/artkey/mft-201705-0017.php
AB Nowadays, there is effort to substitute in aerospace industry so far commonly used alloys (especially nickel alloys) with new low-density materials, which will have comparable mechanical properties and good resistance against high-temperature oxidation. Ti-Al intermetallic alloys are in this trend modern, already-used material. The results of the tests show that further enhancement of properties can be achieved by addition of silicon. The disadvantage of these materials is a low fracture toughness at room temperature and difficult production. Powder metallurgy seems to be a way to replace still used melting metallurgy. In this work, cyclic oxidation of Ti-Al-Si alloys prepared by reactive sintering, milling and Spark Plasma Sintering is described. The TiAl10Si30 alloy was evaluated as the best alloy from tested ones, because was the most resistant to the stresses. Stress was induced into the oxide layer by repeated annealing and cooling.