A method for disentangling β-Si3N4 seeds obtained by SHS

✍ Scribed by Manuel Belmonte; Pilar Miranzo; M. Isabel Osendi

• Book ID: 104088743
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 458 KB
• Volume: 182
• Category: Article
• ISSN: 0032-5910
• DOI: 10.1016/j.powtec.2007.06.012

✦ Synopsis

The manufacture of β-Si 3 N 4 seeds by self-propagating high temperature synthesis (SHS) presents some advantages, such as the low production costs, compared to other preparation methods based on sintering of α-Si 3 N 4 powders and subsequent leaching out of the glassy phase. However, SHS process produces seed clusters that must be disentangled before use as reinforcing particles. Different mechanical and chemical treatments were tried to achieve good seed dispersion, proving that a combined treatment based on a hot basic etching and a short time attrition milling gave almost agglomerate-free particles with adequate features for seeding use.