Open AccessEffect of high-energy attrition milling and La2O3 content on the microstructure of Mo-La2O3 composite powders
Author(s) -
Pavel Komarov,
Serhii Tkachenko,
Michaela Remešová,
Andréa Deák,
Deborah E. Crawford,
Mariano Casas-Luna,
Vendula Bednaříková,
Ede Bodoki,
Jaroslav Cihlář,
Ladislav Čelko
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1178/1/012030
Subject(s) - materials science , composite number , microstructure , ceramic , composite material , phase (matter) , high energy , thermal stability , attrition , lanthanum oxide , creep , particle size , oxide , metallurgy , chemical engineering , medicine , chemistry , organic chemistry , engineering physics , dentistry , engineering
Mo-La 2 O 3 composites are potential high-temperature materials for future technology devices operating at temperatures above 1300 °C because of their excellent thermal stability, high mechanical properties and good creep resistance. In this study, we focused on the preparation of Mo-matrix/lanthanum oxide (La 2 O 3 ) composite powders using high-energy attrition milling. The effects of rotational milling speed (350 and 800 rpm) and La 2 O 3 content (2.5 and 10 vol. %) on the microstructural evolution, phase composition, morphology, and distribution of the second phase in the produced composite Mo-La 2 O 3 powders were investigated in details. The results show that the most interesting composite powder was Mo-10 vol.% La 2 O 3 produced using a rotational speed of 800 rpm, which exhibited better distribution, smaller particle size and higher amount of ceramic phase introduced in the interiors of the Mo grains.