Abstract
To protect graphite matrix from oxidation, B modified ZrB2-SiC coatings were prepared on SiC coated graphite by a two-step pack cementation. The microstructure, thermal cycling and oxidation resistant properties of the coatings were studied. The results show that the as-prepared coatings were mainly composed of SiC, ZrB2 and Si. ZS50-1B, ZS50-3B and ZS50-5B showed good thermal cycling resistance with 97.4%, 98.2% and 98.6% weight retention after 15 thermal cycles between 1500°C and room temperature. ZS50-7B and ZS50-9B showed good oxidation resistance with 93.5% and 97.5% weight retention after 19h oxidation at 1500°C.
| Original language | English |
|---|---|
| Pages (from-to) | 330-337 |
| Number of pages | 8 |
| Journal | Surface and Coatings Technology |
| Volume | 280 |
| DOIs | |
| State | Published - 25 Oct 2015 |
Keywords
- Boron addition
- Coating
- Oxidation resistance
- Thermal cycling resistance
- ZrB-SiC
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