Abstract
Ultrafine preceramic Si/C/N composite powders have been prepared from hexamethyl-disilazane (HMDS) by laser-induced gas phase reaction, using a new kind of two-reaction-zone reactor which could efficiently increase laser efficiency and production yield compared with a one-reaction-zone reactor. The as-formed products were nanosized (50-80 nm), amorphous powders containing Si-C and Si-N bonds homogeneously mixed with some excess carbon. The production yield was in the range of 88-120 g/h. Changes of chemical composition and crystallization of the powders during heat treatment at 1350 and 1550°C under nitrogen for 1 h were studied.
| Original language | English |
|---|---|
| Pages (from-to) | 1996-2002 |
| Number of pages | 7 |
| Journal | Journal of Materials Research |
| Volume | 13 |
| Issue number | 7 |
| DOIs | |
| State | Published - Jul 1998 |