Nb/Nb_5Si_3微叠层复合材料制备与其组织结构
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摘要
采用大功率离子束辅助(IBAD)电子束物理气相沉积(EB-PVD)制备Nb/Nb5Si3叠层状复合材料。利用X-射线衍射(XRD)和扫描电镜(SEM)对材料的组成相和微观结构进行分析,探讨EB-PVD制备工艺对微叠层材料的结构和形貌的影响。采用双靶材、蒸气垂直入射及高温高束流制备微叠层材料,并进行真空热处理以考察微叠层材料在1200℃下保温3h后的结构演变。实验结果表明:制备出Nb/Nb5Si3微叠层复合材料,由立方Nb和四方Nb5Si3混合相组成,具有明显的层状结构。真空热处理后,微叠层材料柱状晶结构向等轴晶转化。
Nb / Nb5Si3 microlaminated sheet was prepared by ion beam assisted electron beam physical vapor deposition technology( EBPVD). The composites and microstructure of Nb / Nb5Si3 were analyzed by XRD and SEM. The structure and morphology of microlaminated materials prepared under the different conditions of EB-PVD were investigated. The microlaminated materials were synthesized by vertically incident,high electron beam and high temperature with the double-target deposition method. The results indicate that the prepared material with visible lamellar structure is composed of cubic Nb and Tetragonal Nb5Si3 phases. The degradation of columnar grain was investigated after annealing under the condition of 1200℃ /3h. It is shown that after vacuum heat treatment,the columnar grain structure is transformed to equiaxed grain structure in microlaminated material.
Nb / Nb5Si3 microlaminated sheet was prepared by ion beam assisted electron beam physical vapor deposition technology( EBPVD). The composites and microstructure of Nb / Nb5Si3 were analyzed by XRD and SEM. The structure and morphology of microlaminated materials prepared under the different conditions of EB-PVD were investigated. The microlaminated materials were synthesized by vertically incident,high electron beam and high temperature with the double-target deposition method. The results indicate that the prepared material with visible lamellar structure is composed of cubic Nb and Tetragonal Nb5Si3 phases. The degradation of columnar grain was investigated after annealing under the condition of 1200℃ /3h. It is shown that after vacuum heat treatment,the columnar grain structure is transformed to equiaxed grain structure in microlaminated material.
引文
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[22]申造宇,黄光宏,何利民,等.大尺寸Ti Al/Ti3Al微叠层薄板制备与热稳定性研究[J].材料研究学报,2014,28(4):314-320.(SHEN Z Y,HUANG G H,HE L M,et al.Preparation and thermal stability of large-sized Ti Al/Ti3Al microlaminated thin sheets[J].Chinese Journal of Materials Research,2014,28(4):314-320.)
[2]曹义,程海峰,肖加余,等.美国金属热防护系统研究进展[J].宇航材料工艺,2003,33(3):9212-9215.(CAO Y,CHENG H F,XIAO J Y,et al.An introduction to American metallic TPS research work[J].Aerospace Materials&Technology,2003,33(3):9212-9215.)
[3]梁春华,李晓欣.先进材料在战斗机发动机上的应用与研究趋势[J].航空材料学报,2012,32(6):32-36.(LIANG C H,LI X X.Application and development trend of advanced materials for fighter engine[J].Journal of Aeronautical Materials,2012,32(6):32-36.)
[4]DIMIDUK D M.Gamma titanium aluminide alloys-an assessment within the competition of aerospace structural materials[J].Materials Science and Engineering:A,1999,263:281-288.
[5]EDWARD A L.Gamma titanium aluminides as prospective structural materials[J].Intermetallics,2000,8(9/11):1339-1345.
[6]马培燕,傅正义.微叠层结构材料的研究现状[J].材料科学与工程,2002,20(4):589-593.(MA P Y,FU Z Y,The latest research on the microlaminated structural materials[J].Journal of Materials Science and Engineering,2002,20(4):589-593.)
[7]HEATHCOTE J,ODETTE G R,LUCAS G E,et al.On the micromechanics of low temperature strength and toughness of intermetallic/metallic microlaminate composites[J].Acta Materialia,1996,44(11):4289-4299.
[8]FERRARI B,SANCHEZ-HERENCIA A J,MORENO R.Aqueous electrophoretic deposition of Al2O3/Zr O2layered ceramics[J].Materials Letters,1998,35(5/6):370-374.
[9]WAS G S,FOECKE T.Deformation and fracture in microlaminates[J].Thin Solid Films,1996,286(1/2):1-31.
[10]孙彦波,马凤梅,肖文龙,等.Ti-Al系金属间化合物基叠层结构材料的制备技术与组织性能特征[J].航空材料学报,2014,34(4):98-111.(SUN Y B,MA F M,XIAO W L,et al.Preparation and performance characteristics for multilayered Ti-Al intermetallics alloys[J].Journal of Aeronautical Materials,2014,34(4):98-111.)
[11]CAO H C,LOFVANDER J P A,EVANS A G,et al.Mechanical properties of an in situ synthesized Nb/Nb3Al layered composite[J].Materials Science and Engineering:A,1994,185(1/2):87-95.
[12]BEWLAY B P,JACKSON M R,ZHAO J C.A review of very-high-temperature Nb-silicide-based composites[J].Metall Mater Trans:A,2003,34(10):2043-2052.
[13]ZHAO J C,WESTBRIIK J K.Ultrahigh-temperature materials for jet engines[J].MRS Bull,2003,28(9):622-630.
[14]张松,郭喜平.合金化对铌-硅基超高温合金组织和性能影响的研究进展[J].材料导报,2012,26(10):95-99.(ZHANG S,GUO X P.Research progress in the effects of alloying elements on the microstructure and properties of niobium silicide based ultra-high temperature alloys[J].Materials Review,2012,26(10):95-99.)
[15]WORD-CLOSE C M,FROES F H.Developments in the synthesis of lightweight metals[J].JOM,1994,46(1):28-31.
[16]GUO H S,GUO X P,JIA L N,et al.Effects of compositions and melting processes on the microstructure of multicomponent Nb-Si based super-high temperature alloys[J].Rare Metal Materials and Engineering,2008,37(7):1299-1303.
[17]YAO C F,GUO X P.Microstructural characteristics of integrally directionally solidified Nb-Ti-Si base ultrahigh temperature alloy with crucibles[J].Acta Metallurgica Sinica,2008,44(5):579-584.
[18]WANG Y,GUO X P.Effect of solidifying rate on integrally directionally solidified microstructure and solid/liquid interface morphology of an Nb-Ti-Si based alloy[J].Acta Metallurgica Sinica,2010,46(4):506-512.
[19]曲士昱,王荣明,韩雅芳.热处理对Nb-10Si合金显微组织的影响[J].航空材料学报,2001,21(3):9-12.(QU S Y,WANG R M,HAN Y F.Effect of heat-treatment on microstructures of the Nb-10Si alloy[J].Journal of Aeronautical Materials,2001,21(3):9-12.)
[20]宋立国,曲士昱,宋尽霞,等.1250℃热处理对Nb-16Si-24Ti-6Cr-6Al-2Hf合金的组织影响[J].材料工程,2005(12):30-32.(SONG L G,QU S Y,SONG J X,et al.Effect of heat treatment at 1250℃on microstructure of Nb-16Si-24Ti-6Cr-6Al-2Hf alloy[J].Journal of Materials Engineering,2005(12):30-32.)
[21]牟仁德,贺世美,何利民,等.微叠层结构EB-PVD热障涂层[J].航空材料学报,2009,29(3):55-60.(MU R D,HE S M,HE L M,et al.EB-PVD thermal barrier coatings with microlaminated structure[J].Journal of Aeronautical Materials,2009,29(3):55-60.)
[22]申造宇,黄光宏,何利民,等.大尺寸Ti Al/Ti3Al微叠层薄板制备与热稳定性研究[J].材料研究学报,2014,28(4):314-320.(SHEN Z Y,HUANG G H,HE L M,et al.Preparation and thermal stability of large-sized Ti Al/Ti3Al microlaminated thin sheets[J].Chinese Journal of Materials Research,2014,28(4):314-320.)