Demonstration of spontaneous liquid-phase sintering of mesophase powders

✍ Scribed by Werner R. Hoffmann; Klaus J. Hüttinger

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 624 KB
• Volume: 31
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(93)90029-a

✦ Synopsis

Pellets of a commercially available mesophase powder suitable for the production of finegrained carbons were shock-heated at 2 and 5 MPa inert gas pressure up to temperatures between 300 and 500°C. After treatment times between 10 and 60 s, the material was rapidly cooled down. For these treatments the Curie point technique was used. The formation of sintering bridges as a consequence of the treatment was studied with scanning electron microscopy. Liquid-phase sintering occurred at 400°C and 60 s (2 MPaj and at 300°C and 30 s 15 MPa). From these results it was concluded that liauid-phase sinterina by viscous iow can be a spontaneous pro&s, provided that the conditions are adequate to-retain the flow properties to permit sintering before hardening stops the process.