Real-time atomic-resolution observation of coherent twin boundary migration in CrN
Source abstract
Abstract
Abstract Although coherent twin boundary (CTB) migration in fcc metals has been widely studied, little is known about the CTB migration behavior in the binary transition-metal nitrides system (e.g. rock-salt CrN). Using in-situ atomic-resolution electron microscopy, we report two different twin boundary defect (TD) nucleation and CTB migration modes at the CTB/ITB (incoherent twin boundary) and CTB/surface junctions. A new twin defect nucleation and CTB migration mode are observed from the CTB/surface junction. We show that such CTB migration is associated with a boundary structure alternating from an N-terminated to Cr-terminated, involving Cr and N atom respective motion, i.e., asynchronous CTB migration. We further reveal the dynamic and thermodynamic mechanism of such asynchronous migration through strain analysis and DFT simulations. Our findings uncover an atomic-scale dynamic process of defect nucleation and CTB migration in a binary system, which provides new insight into the atomic-scale deformation mechanism in complex materials.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metal and Thin Film Mechanics · Boron and Carbon Nanomaterials Research · Microstructure and mechanical properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (51)
Show source-provided references
1. Plastic deformation of single crystals of sapphire: basal slip and twinning10.1016/0001-6160(57)90090-1 ↗
2. Dislocations in Complex Materials10.1126/science.1105962 ↗
3. Nonstoichiometric Dislocation Cores in α-Alumina10.1126/science.1136155 ↗
4. Designing superhard, self-toughening CrAlN coatings through grain boundary engineering10.1016/j.actamat.2012.06.049 ↗
5. Grain boundary design of thin films: using tilted brittle interfaces for multiple crack deflection toughening10.1016/j.actamat.2016.09.027 ↗
6. Microstructural design of hard coatings10.1016/j.pmatsci.2006.02.002 ↗
7. Revealing the Maximum Strength in Nanotwinned Copper10.1126/science.1167641 ↗
8. Strengthening Materials by Engineering Coherent Internal Boundaries at the Nanoscale10.1126/science.1159610 ↗
9. Strength, strain-rate sensitivity and ductility of copper with nanoscale twins10.1016/j.actamat.2006.06.062 ↗
10. Ultrahigh Strength and High Electrical Conductivity in Copper10.1126/science.1092905 ↗
11. Structure and motion of junctions between coherent and incoherent twin boundaries in copper10.1016/j.actamat.2009.06.009 ↗
12. Defective twin boundaries in nanotwinned metals10.1038/nmat3646 ↗
13. Ideal maximum strengths and defect-induced softening in nanocrystalline-nanotwinned metals10.1038/s41563-019-0484-3 ↗
14. Dislocation nucleation governed softening and maximum strength in nano-twinned metals10.1038/nature08929 ↗
15. First-principles density functional theory study of generalized stacking faults in TiN and MgO10.1080/14786435.2013.856525 ↗
16. Understanding dislocation slip in stoichiometric rocksalt transition metal carbides and nitrides10.1007/s10853-017-0857-4 ↗
17. Elastic Properties and Stacking Fault Energies of Borides, Carbides and Nitrides from First-Principles Calculations10.1007/s40195-019-00873-8 ↗
18. Growth-twins in CrN/AlN multilayers induced by hetero-phase interfaces10.1016/j.actamat.2019.11.063 ↗
19. In situ atomic-scale observation of continuous and reversible lattice deformation beyond the elastic limit10.1038/ncomms3413 ↗
20. The peculiarity of the metal-ceramic interface10.1038/srep11460 ↗
21. Superlattice-induced oscillations of interplanar distances and strain effects in the CrN/AlN system10.1103/PhysRevB.95.155305 ↗
22. From ultrasoft pseudopotentials to the projector augmented-wave method10.1103/PhysRevB.59.1758 ↗
23. Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set10.1103/PhysRevB.54.11169 ↗
24. Generalized Gradient Approximation Made Simple10.1103/PhysRevLett.77.3865 ↗
25. Antiferromagnetic Structure of CrN10.1103/PhysRev.117.929 ↗
26. First-principles density functional theory study of generalized stacking faults in TiN and MgO10.1080/14786435.2013.856525 ↗
27. The formation mechanisms of growth twins in polycrystalline Al with high stacking fault energy10.1016/j.actamat.2015.08.046 ↗
28. Transition of dislocation nucleation induced by local stress concentration in nanotwinned copper10.1038/ncomms8648 ↗
29. Steps, dislocations and disconnections as interface defects relating to structure and phase transformations10.1016/S1359-6454(96)00132-2 ↗
30. Detwinning mechanisms for growth twins in face-centered cubic metals10.1016/j.actamat.2009.12.013 ↗
31. Dynamical observations on the crack tip zone and stress corrosion of two-dimensional MoS210.1038/ncomms14116 ↗
32. Dislocation motion and grain boundary migration in two-dimensional tungsten disulphide10.1038/ncomms5867 ↗
33. In Situ Scanning Transmission Electron Microscopy Observations of Fracture at the Atomic Scale10.1103/PhysRevLett.125.246102 ↗
34. Atomically Sharp Crack Tips in Monolayer MoS2 and Their Enhanced Toughness by Vacancy Defects10.1021/acsnano.6b05435 ↗
35. High resolution transmission electron microscope observation of zero-strain deformation twinning mechanisms in Ag10.1103/PhysRevLett.106.175504 ↗
36. Atom-by-Atom Observation of Grain Boundary Migration in Graphene10.1021/nl301141g ↗
37. Ion and electron irradiation-induced effects in nanostructured materials10.1063/1.3318261 ↗
38. Radiation damage in the TEM and SEM10.1016/j.micron.2004.02.003 ↗
39. Electron-beam-assisted superplastic shaping of nanoscale amorphous silica10.1038/ncomms1021 ↗
40. In situ Transmission-Electron-Microscopy Investigation of Melting in Submicron Al-Si Alloy Particles under Electron-Beam Irradiation10.1103/PhysRevLett.91.265504 ↗
41. Influence of AlN layers on mechanical properties and thermal stability of Cr-based nitride coatings10.1016/j.tsf.2012.12.057 ↗
42. Influence of CrN and AlN layer thicknesses on structure and mechanical properties of CrN/AlN superlattices10.1016/j.tsf.2013.07.026 ↗
43. Synthesis of CrN/AlN superlattice coatings using closed-field unbalanced magnetron sputtering process10.1016/S0257-8972(03)00244-5 ↗
44. Nano-structured CrN/AlN multilayer coatings synthesized by pulsed closed field unbalanced magnetron sputtering10.1016/j.surfcoat.2009.04.013 ↗
45. CrN/AlN superlattice coatings synthesized by pulsed closed field unbalanced magnetron sputtering with different CrN layer thicknesses10.1016/j.tsf.2009.02.136 ↗
46. Characterization of low temperature CrN and TiN (PVD) hard coatings10.1016/0257-8972(95)08214-X ↗
47. Effect of heat treatment on mechanical properties and microstructure of CrN/AlN multilayer coatings10.1016/j.tsf.2005.08.198 ↗
48. Effects of twin boundaries in vanadium nitride films subjected to tensile/compressive deformations10.1016/j.apsusc.2017.07.174 ↗
49. Deformation and Cracking Mechanism in CrN/TiN Multilayer Coatings10.3390/coatings9060363 ↗
50. Deformation mechanisms in TiN/(Ti,Al)N multilayers under depth-sensing indentation10.1016/j.actamat.2005.12.010 ↗
51. Surface energies of AlN allotropes from first principles10.1016/j.scriptamat.2012.07.027 ↗