Thermodynamic analysis and experimental validation of CaO-ZrO2-TiO2-BN material
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摘要: 從Ca-O-N、Zr-O-N、Ti-O-N及B-O-N的疊加的優勢區圖可以看出CaO-ZrO2-TiO2-BN體系在1823K下可以穩定存在.XRD分析結果表明氧化物之間高溫下形成了復雜的化合物或固溶體.應用FactSage軟件計算CaO-ZrO2-TiO2三元相圖得出,通過控制TiO2的加入量,能夠將體系控制在高溫固相區,可用作水口材料.由于鋼水中[Al]的存在,BN在連鑄過程中不會被水口內部達到平衡時的游離O2以及鋼中溶解[O]所氧化.Abstract: It is found that CaO-ZrO2-TiO2-BN system can stably exist at 1823 K from the overlapped phase stability diagram of Ca-O-N, Zr-O-N, Ti-O-N and B-O-N systems. XRD analysis results indicate that oxides in the system form complex compounds or solid solution. The phase diagram of CaO-ZrO2-TiO2 was Calculated by FactSage software, and the results show that the system can be controlled in solid section at high temperature through controlling TiO2 quantity. During continuous casting, BN cannot be oxidized by O2 or[O] because of the existence of[Al] in molten steel.
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Key words:
- calcium oxide /
- zirconium oxide /
- titanium oxide /
- boron nitride /
- quaternary system /
- phase stability diagram /
- ternary phase diagram
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