Abstract
Chemical reaction process (Ti+CrB→Cr+TiB) of isolated CrB particle in a Ti powder compact was investigated to find a proper sintering condition for producing TiB/Ti composites by reaction sintering. EPMA analysis revealed that the formation of TiB starts at 1223 K during heated with the rate of 0.17 K/s. The reaction proceeds topochemically with the movement of a reaction band from the particle surface to inside. The unreacted-core model was applied to the reaction of a CrB particle for the analyse the reaction rate of CrB particle. It was found that diffusion of Ti and Cr atoms in a TiB layer controls the whole reaction rate, and then the time of reaction finish at 1223 K was estimated as a function of initial CrB particle radius.
| Original language | English |
|---|---|
| Pages (from-to) | 362-367 |
| Number of pages | 6 |
| Journal | Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals |
| Volume | 67 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 2003 |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Mechanics of Materials
- Metals and Alloys
- Materials Chemistry