Revealing the ductility of nanoceramic MgAl2O4

被引:11
作者
Chen, Bin [1 ]
Huang, Yuanjie [1 ]
Xu, Jianing [1 ]
Zhou, Xiaoling [1 ]
Chen, Zhiqiang [1 ]
Zhang, Hengzhong [1 ]
Zhang, Jie [2 ]
Qi, Jianqi [2 ]
Lu, Tiecheng [2 ]
Banfield, Jillian F. [3 ]
Yan, Jinyuan [4 ]
Raju, Selva Vennila [4 ]
Gleason, Arianna E. [4 ,5 ]
Clark, Simon [4 ]
MacDowell, Alastair A. [4 ]
机构
[1] Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China
[2] Sichuan Univ, Dept Phys, Chengdu 610064, Sichuan, Peoples R China
[3] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA
[4] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA
[5] SLAC Natl Accelerator Lab, Menlo Pk, CA 94305 USA
基金
中国国家自然科学基金;
关键词
ceramic; ductility; nanostructure; NANOCRYSTALLINE METALS; MAXIMUM STRENGTH; SPINEL; DEFORMATION; DISLOCATIONS; TRANSITION; DEPENDENCE; MECHANISM; ALUMINUM; BEHAVIOR;
D O I
10.1557/jmr.2019.114
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Ceramics are strong but brittle. According to the classical theories, ceramics are brittle mainly because dislocations are suppressed by cracks. Here, the authors report the combined elastic and plastic deformation measurements of nanoceramics, in which dislocation-mediated stiff and ductile behaviors were detected at room temperature. In the synchrotron-based deformation experiments, a marked slope change is observed in the stress-strain relationship of MgAl2O4 nanoceramics at high pressures, indicating that a deformation mechanism shift occurs in the compression and that the nanoceramics sample is elastically stiffer than its bulk counterpart. The bulk-sized MgAl2O4 shows no texturing at pressures up to 37 GPa, which is compatible with the brittle behaviors of ceramics. Surprisingly, substantial texturing is seen in nanoceramic MgAl2O4 at pressures above 4 GPa. The observed stiffening and texturing indicate that dislocation-mediated mechanisms, usually suppressed in bulk-sized ceramics at low temperature, become operative in nanoceramics. This makes nanoceramics stiff and ductile.
引用
收藏
页码:1489 / 1498
页数:10
相关论文
共 55 条
[1]   Probing Plasticity and Strain-Rate Effects of Indium Submicron Pillars Using Synchrotron Laue X-Ray Microdiffraction [J].
Ali, Hashina Parveen Anwar ;
Tamura, Nobumichi ;
Budiman, Arief Suriadi .
IEEE TRANSACTIONS ON DEVICE AND MATERIALS RELIABILITY, 2018, 18 (04) :490-497
[2]  
Anderson O., 1995, AGU HDB, V2, P64, DOI DOI 10.1029/RF002P0064
[3]  
[Anonymous], 2013, ACTA PAEDIATR, V102, pe164, DOI DOI 10.1063/1.4775596
[4]  
[Anonymous], 2007, HERALD J, V98, pA1, DOI DOI 10.1103/PhysRevLett.98.095502
[5]  
[Anonymous], 1992, THEORY DISLOCATIONS
[6]   STRESS AT WHICH DISLOCATIONS ARE GENERATED AT A PARTICLE-MATRIX INTERFACE [J].
ASHBY, MF ;
GELLES, SH ;
TANNER, LE .
PHILOSOPHICAL MAGAZINE, 1969, 19 (160) :757-&
[7]   FINITE STRAIN ISOTHERM AND VELOCITIES FOR SINGLE-CRYSTAL AND POLYCRYSTALLINE NACL AT HIGH-PRESSURES AND 300-DEGREE-K [J].
BIRCH, F .
JOURNAL OF GEOPHYSICAL RESEARCH, 1978, 83 (NB3) :1257-1268
[8]   A search for evidence of strain gradient hardening in Au submicron pillars under uniaxial compression using synchrotron X-ray micro diffraction [J].
Budiman, A. S. ;
Han, S. M. ;
Greer, J. R. ;
Tamura, N. ;
Patel, J. R. ;
Nix, W. D. .
ACTA MATERIALIA, 2008, 56 (03) :602-608
[9]   STRESS DEPENDENCE OF THE MECHANISM OF THE OLIVINE SPINEL TRANSFORMATION [J].
BURNLEY, PC ;
GREEN, HW .
NATURE, 1989, 338 (6218) :753-756
[10]   Texture of Nanocrystalline Nickel: Probing the Lower Size Limit of Dislocation Activity [J].
Chen, Bin ;
Lutker, Katie ;
Raju, Selva Vennila ;
Yan, Jinyuan ;
Kanitpanyacharoen, Waruntorn ;
Lei, Jialin ;
Yang, Shizhong ;
Wenk, Hans-Rudolf ;
Mao, Ho-kwang ;
Williams, Quentin .
SCIENCE, 2012, 338 (6113) :1448-1451