(1. 上海大學 省部共建高品質(zhì)特殊鋼冶金與制備國家重點實驗室，上海 200072；
2. 上海特種鑄造工程技術(shù)研究中心，上海 201605)
摘 要: 以自合成的BaZrO3粉體為材料制備成坩堝，在真空條件下熔煉了TiAl 合金，并對熔煉后合金的顯微組織及合金與BaZrO3耐火材料的界面反應(yīng)情況進行研究。結(jié)果表明：熔煉后合金的顯微組織由大量不同取向的片層狀α2+γ和少量條塊狀的γ相組成；合金熔體對BaZrO3耐火材料的潤濕性較差，熔煉后未觀察到界面反應(yīng)層的存在；BaZrO3對合金熔體具有良好的化學惰性，是極具潛力的TiAl 合金熔煉用耐火材料。
關(guān)鍵字: BaZrO3；TiAl；合金熔煉；界面反應(yīng)
（1. State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200072, China;
2. Shanghai Special Casting Engineering Technology Research Center, Shanghai 201605, China）
Abstract:A homemade BaZrO3 crucible was used to melt TiAl alloys, the microstructure of the melt TiAl alloys and interface reaction between the BaZrO3 refractory and TiAl melt were investigated. The results demonstrate that the microstructure of TiAl alloys is largely composed of lamellar α2+γ with different orientations and small amount of bulk γ phase; the melts exhibit poor wettability with BaZrO3 refractory and no reaction layer is observed between them. This may imply that the BaZrO3 is a promising candidate of materials for the melting of TiAl alloys.
Key words: BaZrO3; TiAl; alloy melting; interface reaction
