硅铝复合水解液对硅基陶瓷型芯高温性能的影响
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摘要
以Si/Al质量比可调的硅铝复合水解液为研究对象,对硅基陶瓷型芯进行高温强化,并与硅酸乙酯水解液和硅溶胶强化的型芯进行性能对比。结果表明,采用Si/Al比为1∶3的硅铝复合水解液(SA13)强化后,型芯的密度、显气孔率、高温抗弯强度和抗变形能力介于硅酸乙酯水解液与硅溶胶之间;硅铝复合水解液(SA13)强化型芯的高温尺寸稳定性最佳,与单晶高温合金DD6接触的高温化学稳定性也有所提高。
The properties of silica-based ceramic cores impregnated by the hydrolysate with different Si/Al ratio were analyzed comparatively for those of ethyl silicate hydrolysate(TOES)and Si-sol.The results reveal that the density,porosity,high temperature strength and the resistance of high temperature deformation of the ceramic cores impregnated by the composite hydrolysate with Si/Al ratio of 1∶3 are improved to some extent,and the values are between those of TOES and Si-sol.After impregnated by SA13,the cores present an optimal size stability and better high temperature chemical stability with DD6 superalloy.
The properties of silica-based ceramic cores impregnated by the hydrolysate with different Si/Al ratio were analyzed comparatively for those of ethyl silicate hydrolysate(TOES)and Si-sol.The results reveal that the density,porosity,high temperature strength and the resistance of high temperature deformation of the ceramic cores impregnated by the composite hydrolysate with Si/Al ratio of 1∶3 are improved to some extent,and the values are between those of TOES and Si-sol.After impregnated by SA13,the cores present an optimal size stability and better high temperature chemical stability with DD6 superalloy.
引文
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[2]康海峰,李飞,赵彦杰,等.高温合金空心叶片精密铸造用陶瓷型芯与型壳的研究现状[J].材料工程,2013(8):85-91.
[3]曹腊梅.定向空心叶片的陶瓷型芯[J].航空制造工程,1995(10):11-12.
[4]赵宪涛,成来飞,张立同,等.强化对硅基陶瓷型芯高温强度的影响[J].热加工工艺,2012,41(1):1-4.
[5]杨耀武,曹腊梅,才广慧.强化处理对单晶叶片用氧化铝基陶瓷型芯的影响[J].航空材料学报,1995,15(3):33-38.
[6]赵红亮,翁康荣,关绍康,等.强化处理对Al2O3-SiO2陶瓷型芯高温变形的影响[J].特种铸造及有色合金,2003(5):7-8.
[7]孙革,张玲,刘军和,等.强化对硅基型芯性能的影响[J].铸造,2013,62(5):440-442.
[8]WANG L L,LI J R,TANG D Z,et al.Effect of directional solidification condition on interfacial reaction between DD6single crystal superalloy and zirconia-silica ceramic core[J].Advanced Materials Research,2014,926-930:72-76.
[9]王丽丽,李嘉荣,唐定中,等.SiO2-ZrO2陶瓷型芯与DZ125、DD5和DD6三种铸造高温合金的界面反应[J].材料工程,2016,44(3):9-14.
[10]韩向楠,刘志义,郭敏,等.定向硅基陶瓷型芯的高温强化[J].粉末冶金材料科学与工程,2011,16(5):647-653.
[11]郭新力,娄延春,黄国华,等.强化处理对硅基陶瓷型芯高温性能的影响[J].铸造,2012,61(11):1 299-1 302.
[12]薛明.定向凝固过程中陶瓷与高温合金界面研究[D].北京:清华大学,2007.
[13]ANANTHAPADMANABHAN P V,MENON S B,VENKATRAMANI N,et al.Destabilization of calcia stabilized zirconia[J].Journal of Materials Science,1989,24(12):4 432-4 436.
[14]OSBORN E F,MUAN A.Phase Equilibrium Diagrams of Oxide Systems[M].America:The American Ceramic Society and the Edward Orton Jr.Ceramic Foundation,1960.
[15]HONG K J,KIM J M,KIM H S.Microstructure and properties of CaO-ZrO2-SiO2glass-ceramics prepared by sintering[J].Journal of the European Ceramic Society,2003,23(13):2 193-2 202.