机械合金化+热压制备Laves相NbCr2合金及其组织性能研究

航空材料学报, 2007, 27(5): 7-11. doi: 10.3969/j.issn.1005-5053.2007.05.002

机械合金化+热压制备Laves相NbCr2合金及其组织性能研究

肖璇 ^1, , 鲁世强 ^2, , 马燕青 ^3, , 晏建武 ^4, , 胡平 ^5,

1.南京航空航天大学,机电学院,南京,210016;南昌航空工业学院,材料学院,南昌,330034

2.南昌航空工业学院,材料学院,南昌,330034

3.南昌航空工业学院,材料学院,南昌,330034

4.南昌航空工业学院,材料学院,南昌,330034

5.南昌航空工业学院,材料学院,南昌,330034

基金项目: 江西省材料科学与工程中心资助项目(ZX200401001) 国家自然科学基金(50474009) 江西省自然科学基金(0350045) 航空基础科学基金(05G56003)

关键词：机械合金化 , 热压 , Laves相NbCr2 , 组织与性能

Investigation on Microstructures and Properties of NbCr2 Laves Phase Alloys Prepared by Mechanical Alloying Followed by Hot Pressing

采用机械合金化+热压工艺路线来制备化学配比成分的单相Laves相NbCr2合金.研究了Cr,Nb元素粉经20h球磨后在1200℃,1250℃和1300℃不同时间热压所获得的Laves相NbCr2合金的组织和性能.结果表明:1250℃×0.5h热压获得的Laves相NbCr2合金组织均匀,晶粒尺寸达到微/纳米级,致密度达到97.1%,室温断裂韧性高于5.07MPa·m1/2.与熔铸工艺制备的单相Laves相NbCr2合金的断裂韧性1.50MPa·m1/2相比,所制备的单相Laves相NbCr2合金的室温断裂韧性大大提高,充分实现了细晶韧化的效果.

参考文献

[1]	Kwai S. Chan;David L. Davidson .The Fracture Resistance and Crack-Tip Micromechanics of In-Situ Intermetallic Composites[J].JOM,1996(9):62-67.
[2]	TAKEYAMA M;LIU C T .Microstructure and mechanical properties of Laves-phase alloys based on Cr2Nb[J].Materials Science and Engineering A,1991,132:61-66.
[3]	Thoma DJ.;Nibur KA.;Chen KC.;Cooley JC.;Dauelsberg LB.;Hults WL. Kotula PG. .The effect of alloying on the properties of (Nb,Ti)Cr-2 C15 Laves phases[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(0):408-415.
[4]	Takasugi T.;Yoshida M.;Hanada S. .HIGH TEMPERATURE MECHANICAL PROPERTIES OF C15 LAVES PHASE CR2NB INTERMETALLICS[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,1995(0):805-810.
[5]	TAKASUGI T;YOSHIDA M.TEM observation for deformation microstructures of two C15 NbCr2 intermetallic compounds[J].Intermetallics,2002(10):85-93.
[6]	C.T. Liu;J.H. Zhu .Physical metallurgy and mechanical properties of transition-metal Laves phase alloys[J].Intermetallics,2000(9/11):1119-1129.
[7]	K. S. Kumar;L. Pang;J. A. Horton .Structure and composition of Laves phases in binary Cr-Nb, Cr-Zr and ternary Cr-(Nb, Zr) alloys[J].Intermetallics,2003(7):677-685.
[8]	Ohta T.;Nakagawa Y.;Kaneno Y.;Inoue H.;Takasugi IT.;Kim WY. .Microstructures and mechanical properties of NbCr2 and ZrCr2 Laves phase alloys prepared by powder metallurgy[J].Journal of Materials Science,2003(4):657-665.
[9]	鲁世强,黄伯云,贺跃辉.机械合金化对Laves相Cr2Nb因相热反应合成影响[J].航空学报,2003(06):568-572.
[10]	尹衍升,李嘉,谭训彦,张金升.机械合金化-加压烧结制备Fe3Al金属间化合物[J].粉末冶金技术,2004(03):151-155.
[11]	张永刚;陈国良;郭建亭.金属间化合物结构材料[M].北京:国防工业出版社:1015.
[12]	SANBOTH L;LIAW P K;LIU C T et al.Cracking in Cr-Cr2Nb eutectic alloys due to the themal stresses[J].Materials Science and Engineering A,1999,268:184-192.
[13]	D.L. DAVIDSON;K.S. CHAN;D.L. ANTON .The Effects on Fracture Toughness of Ductile-Phase Composition and Morphology in Nb-Cr-Ti and Nb-Si In Situ Composites[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,1996(10):3007-3018.

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