Abstract
Due to the weak properties of W2C phase, its formation during the process of WC synthesis should be prevented. The aim of the present study has been the mechano-chemical synthesis of a WC-Al2O3 composite powder free from undesirable W2C phase through the addition of excess carbon to the WO3-2Al-C initial mixture. Based on the thermodynamic calculations and results of the supplementary experiments in W-yC and W2C-C systems, the possibility of the conversion of W 2C to WC phase through the addition of excess carbon has been investigated. It has been shown that production of a WC-Al2O 3 composite powder by 360 min mechano-chemical treatment of an initial mixture of WO3-2Al-1.8C is possible. TEM observations and Williamson-Hall calculation revealed that the obtained WC-Al2O 3 powder contains macro-size agglomerates in which each agglomerate consists of nano-size phases.
Original language | English |
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Pages (from-to) | 116-121 |
Number of pages | 6 |
Journal | International Journal of Refractory Metals and Hard Materials |
Volume | 36 |
DOIs | |
Publication status | Published - 2013 Jan 1 |
Keywords
- Mechano-chemical processing
- Nano materials
- Tungsten carbide
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry