摘要
以SrCO_(3)和ZrO_(2)为原料、二者摩尔比为2:1,在1400℃通过高温固相合成法制备了锆酸锶质氧化物耐火材料,并在1750℃烧成制备坩埚,将其用于富钛含量Ti_(2)Ni合金的感应熔炼,并与锆酸钡坩埚在合金熔炼的稳定性表现进行了对比研究。通过X射线衍射仪,扫描电子显微镜和光学显微镜,分析研究了锆酸锶质氧化物耐火材料的相组成及微结构,耐火材料与钛合金熔体的界面反应层及熔体受耐火材料的污染程度。结果表明:锆酸锶质氧化物耐火材料主要由Sr_(3)Zr_(2)O_(7)、Sr_(2)ZrO_(4)和Sr O三相共存,动力学反应时间不足是导致Sr_(2)ZrO_(4)单相无法生成的主要原因。锆酸锶质氧化物和锆酸钡坩埚熔炼Ti_(2)Ni合金后的坩埚受侵蚀层分别为1250μm和2120μm,而合金中氧含量平均值分别为0.332%(质量分数)和0.566%。说明锆酸锶质氧化物耐火材料对Ti_(2)Ni合金熔体稳定性优于锆酸钡耐火材料。
A strontium zirconate oxide refractory was prepared by a solid-state reaction method at a mole ratio n(SrO):n(ZrO_(2)) of 2:1and 1 400℃,and Ti_(2)Ni alloys were melted in a crucible at 1 750℃.The phase composition and microstructure of the refractory as well as the key features of Ti_(2)Ni alloy melt interacted with the refractory crucible were investigated by X-ray diffraction (XRD),scanning electron microscopy (SEM) and optical microscopy (OM).The results reveal that the crucible refractory is consisted with the phases of Sr_(2)ZrO_(4),Sr_(3)Zr_(2)O_(7) and Sr O,respectively.The thermodynamically stable phase Sr_(2)ZrO_(4) is unable to obtain separately due to the limitation of the reaction between Sr CO_(3)and ZrO_(2),causing the residues of Sr_(3)Zr_(2)O_(7 )and Sr O.The thickness of interaction layer for the strontium zirconate oxide and barium zirconate crucible are 1 250μm and 2 120μm,respectively.The oxygen concentrations of the alloy after melting in strontium zirconate oxide and barium zirconate crucible are 0.332%and 0.566%(in mass fraction),respectively.It is indicated that the strontium zirconate oxide refractory exhibits a superior stability,compared to the barium zirconate refractory.
作者
陈光耀
余飞海
侯笑
杨宇辰
肖玉彬
张胤
邹星礼
侯新梅
鲁雄刚
李重河
CHEN Guangyao;YU Feihai;HOU Xiao;YANG Yuchen;XIAO Yubin;ZHANG Yin;ZOU Xingli;HOU Xinmei;LU Xionggang;LI Chonghe(State Key Laboratory of Advanced Special Steel&Shanghai Key Laboratory of Advanced Ferrometallurgy,School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China;Shanghai Special Casting Engineering Technology Research Center,Shanghai 201605,China;Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China)
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2021年第12期2776-2782,共7页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金面上项目(52022054,51974181,51974021)
国家自然科学基金杰出青年基金(No.52025041)
上海高校特聘教授(东方学者)岗位计划(TP2019041)。
关键词
钛合金
锆酸锶
耐火材料
感应熔炼
界面反应
titanium alloys
zirconate strontium
refractory
induction melting
interaction
