Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Yttrium oxide ceramic crucible for titanium alloy smelting and preparation method thereof
The invention relates to an yttrium oxide ceramic crucible for titanium alloy smelting and a preparation method of the yttrium oxide ceramic crucible. According to the technical scheme, yttrium nitrate hexahydrate, lanthanum nitrate hexahydrate and citric acid monohydrate are mixed, ground, dried and subjected to heat treatment, and lanthanum yttrium oxide powder is obtained. Mixing the lanthanum oxide powder with deionized water, and carrying out heat preservation in a water bath to obtain hydrated lanthanum hydroxide; yttrium oxide powder, lanthanum yttrium oxide powder and lanthanum hydroxide are mixed, wet-mixed, dried and ground, and mixed powder is obtained. Mixing the mixed powder with a polyvinyl alcohol aqueous solution, and performing cold isostatic pressing to obtain a yttrium oxide ceramic crucible green body; and then putting the crucible into a magnesium oxide crucible, transferring the crucible into a graphite crucible, and sequentially heating in an induction furnace according to different powers; and cooling to obtain the yttrium oxide ceramic crucible for smelting the titanium alloy. The method is low in energy consumption and production cost, and the prepared product is high in density, mechanical strength and fracture toughness, good in thermal shock resistance, high in molten titanium alloy erosion resistance and long in service life.
本发明涉及一种钛合金熔炼用氧化钇陶瓷坩埚及其制备方法。其技术方案是：将六水合硝酸钇、六水合硝酸镧和一水合柠檬酸混合，研磨，干燥，热处理，得到钇酸镧粉末。将氧化镧粉末与去离子水混合，水浴中保温，得到水化后的氢氧化镧。将氧化钇粉末、钇酸镧粉末和氢氧化镧混合，湿混，干燥，粉磨，得到混合粉末。将混合粉末和聚乙烯醇水溶液混合，冷等静压成型，得到氧化钇陶瓷坩埚生坯。然后置于氧化镁坩埚中并移至石墨坩埚中，再于感应炉中依次按不同功率加热：冷却，制得钛合金熔炼用氧化钇陶瓷坩埚。本发明能耗低和生产成本低，所制备的制品致密度高、机械强度大、断裂韧性高、热震稳定性好、抗熔融钛合金侵蚀能力强和使用寿命长。
Yttrium oxide ceramic crucible for titanium alloy smelting and preparation method thereof
The invention relates to an yttrium oxide ceramic crucible for titanium alloy smelting and a preparation method of the yttrium oxide ceramic crucible. According to the technical scheme, yttrium nitrate hexahydrate, lanthanum nitrate hexahydrate and citric acid monohydrate are mixed, ground, dried and subjected to heat treatment, and lanthanum yttrium oxide powder is obtained. Mixing the lanthanum oxide powder with deionized water, and carrying out heat preservation in a water bath to obtain hydrated lanthanum hydroxide; yttrium oxide powder, lanthanum yttrium oxide powder and lanthanum hydroxide are mixed, wet-mixed, dried and ground, and mixed powder is obtained. Mixing the mixed powder with a polyvinyl alcohol aqueous solution, and performing cold isostatic pressing to obtain a yttrium oxide ceramic crucible green body; and then putting the crucible into a magnesium oxide crucible, transferring the crucible into a graphite crucible, and sequentially heating in an induction furnace according to different powers; and cooling to obtain the yttrium oxide ceramic crucible for smelting the titanium alloy. The method is low in energy consumption and production cost, and the prepared product is high in density, mechanical strength and fracture toughness, good in thermal shock resistance, high in molten titanium alloy erosion resistance and long in service life.
本发明涉及一种钛合金熔炼用氧化钇陶瓷坩埚及其制备方法。其技术方案是：将六水合硝酸钇、六水合硝酸镧和一水合柠檬酸混合，研磨，干燥，热处理，得到钇酸镧粉末。将氧化镧粉末与去离子水混合，水浴中保温，得到水化后的氢氧化镧。将氧化钇粉末、钇酸镧粉末和氢氧化镧混合，湿混，干燥，粉磨，得到混合粉末。将混合粉末和聚乙烯醇水溶液混合，冷等静压成型，得到氧化钇陶瓷坩埚生坯。然后置于氧化镁坩埚中并移至石墨坩埚中，再于感应炉中依次按不同功率加热：冷却，制得钛合金熔炼用氧化钇陶瓷坩埚。本发明能耗低和生产成本低，所制备的制品致密度高、机械强度大、断裂韧性高、热震稳定性好、抗熔融钛合金侵蚀能力强和使用寿命长。
Yttrium oxide ceramic crucible for titanium alloy smelting and preparation method thereof
一种钛合金熔炼用氧化钇陶瓷坩埚及其制备方法
WANG ZHOUFU (Autor:in) / SHU CHAO (Autor:in) / LIU HAO (Autor:in) / MA YAN (Autor:in) / WANG XITANG (Autor:in)
01.09.2023
Patent
Elektronische Ressource
Chinesisch
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