Perspective: Superhard metal borides: A look forward
Source abstract
Abstract
Previous efforts toward the synthesis of materials with superior mechanical properties (e.g., superhardness, high bulk modulus, and high shear modulus) have focused on binary metal boride structures with short covalent bonds. In this paper, we discuss the methods for enhancing the intrinsic and extrinsic hardening factors commonly used to achieve these properties. As the realm of binary metal borides has all but been exhausted, there is a need to move to ternary and higher borides as well as to achieve greater morphological control at the nanoscale. The use of ternary and higher borides as starting materials provides a multitude of diverse compositional and structural combinations. These compounds merit further investigation as they offer the potential for the optimization of mechanical properties.
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Research context
OpenAlex topics: Boron and Carbon Nanomaterials Research · MXene and MAX Phase Materials · Metal and Thin Film Mechanics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry and Biochemistry, University of California, Los Angeles (UCLA) 1 , Los Angeles, California 90095, USA
Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University 2 , Richmond, Virginia 23284, USA
Department of Materials Science and Engineering, University of California, Los Angeles (UCLA) 3 , Los Angeles, California 90095, USA
California NanoSystems Institute (CNSI), University of California, Los Angeles (UCLA) 4 , Los Angeles, California 90095, USA
Funding
National Science Foundation · Virginia Commonwealth University
References (71)
Show source-provided references
1. Rediscovering the crystal chemistry of borides10.1002/adma.201604506 ↗
2. Ultraincompressible, superhard materials10.1146/annurev-matsci-070115-032148 ↗
3. Borides: Solid-state chemistry10.1002/9781119951438.eibc0022.pub2 ↗
4. Boron: Elementary challenge for experimenters and theoreticians10.1002/anie.200903246 ↗
5. Boron: Enabling exciting metal-rich structures and magnetic properties10.1021/acs.accounts.7b00268 ↗
6. 1975
7. Further comments on attempts by H. Moissan, J. B. Hannay and Sir Charles Parsons to make diamonds in the laboratory10.1038/196104a0 ↗
8. Vickers hardness of diamond and CBN single crystals: AFM approach10.3390/cryst7120369 ↗
9. On the hardness of a new boron phase, orthorhombic γ-B2810.3103/s1063457608060117 ↗
10. Ionic high-pressure form of elemental boron10.1038/nature07736 ↗
11. Boron carbide, boron nitride, and metal borides
12. On carbides of scandium and complex carbides of scandium-titanium [in Russian]
13. Conditions of preparation of complex carbide alloys containing scandium carbide10.1007/bf00773695 ↗
14. Some properties of alloys of titanium boride and double titanium-chromium boride wuth boron carbide
15. Toward inexpensive superhard materials: Tungsten tetraboride-based solid solutions10.1021/ja308219r ↗
16. Extrinsic hardening of superhard tungsten tetraboride alloys with group 4 transition metals10.1021/jacs.6b02676 ↗
17. Designing superhard materials10.1126/science.1109830 ↗
18. Design of hard crystals10.1016/j.ijrmhm.2005.05.015 ↗
19. Advancements in the search for superhard ultra-incompressible metal borides10.1002/adfm.200901257 ↗
20. The deformation and ageing of mild steel. 3. Discussion of results10.1088/0370-1301/64/9/303 ↗
21. The cleavage strength of polycrystals
22. The Hall–Petch effect as a manifestation of the general size effect10.1098/rspa.2015.0890 ↗
23. XLI. The equilibrium of linear arrays of dislocations10.1080/14786445108561060 ↗
24. 2006
25. 1969
26. 1969
27. On the theory of super-lattice structures in alloys10.1524/zkri.1935.91.1.23 ↗
28. 1967
29. Substitutional solution hardening10.1016/0001-6160(63)90213-x ↗
30. Mystery of three borides: Differential metal−boron bonding governing superhard structures10.1021/acs.chemmater.7b04378 ↗
31. Ultrastrong boron frameworks in ZrB12: A highway for electron conducting10.1002/adma.201604003 ↗
32. Superhard mixed transition metal dodecaborides10.1021/acs.chemmater.6b02632 ↗
33. Strength and equation of state of boron suboxide from radial X-ray diffraction in a diamond cell under nonhydrostatic compression10.1103/physrevb.70.184121 ↗
34. Ubergangselementen in’ binaren sistem mit bor, kohlenstoff und stickstoff
35. 1960
36. Atomic radii in crystals10.1063/1.1725697 ↗
37. High pressure syntheses of ThB12 and HfB1210.1016/0022-5088(83)90503-9 ↗
38. High pressure syntheses of SmB2 and GdB1210.1016/0022-5088(77)90221-1 ↗
39. Stabilization of LnB12 (Ln = Gd, Sm, Nd, and Pr) in Zr(1–x)Ln(x)B12 under ambient pressure10.1021/acs.inorgchem.6b02311 ↗
40. Stabilization of HfB12 in Y1-XHfxB12 under ambient pressure10.1021/acs.inorgchem.6b00627 ↗
41. Investigation of ternary metal dodecaborides (M1M2M3)B12 (M1, M2 and M3 = Zr, Y, Hf and Gd)10.1039/c8dt00563j ↗
42. Component interactions in {Y, Gd, Tm}-Mo-B ternary systems at 1270K10.1007/bf02677441 ↗
43. Crystal structure of Y2ReB6 and its analogues
44. Redermination of the structure of the compound Y3ReB7 and related compounds10.1016/0022-5088(86)90007-x ↗
45. Yttrium-rhenium-boron and lanthanum-rhenium-boron systems
46. Crystal structure of the new boride Er3CrB7
47. New YMo3B7 boride and its structure
48. New borides LnMo3B7 (Ln = Tb, Dy, Ho, Er, Tm) with the YMo3B7 structure
49. Crystal structure and physical properties of UMo3B710.1016/j.intermet.2017.02.009 ↗
50. Metastable structures in metallurgy10.1007/bf02648333 ↗
51. Spinodal decomposition during continuous cooling10.1016/0001-6160(66)90193-3 ↗
52. A study of phase decomposition in Cu-Ni-Fe alloys10.1016/0956-7151(93)90357-x ↗
53. Structure and properties of spinodally decomposed Cu-Ni-Fe alloys10.1016/0001-6160(70)90150-1 ↗
54. On spinodal decomposition10.1016/0001-6160(61)90182-1 ↗
55. Superhard W0.5Ta0.5B nanowires prepared at ambient pressure10.1063/1.4967447 ↗
56. Superhard monoborides: Hardness enhancement through alloying in W1−xTaxB10.1002/adma.201601187 ↗
57. B-Ti (boron-titanium)
58. Critical assessment and thermodynamic calculation of the binary system boron-tungsten (B-W)10.1007/bf02664852 ↗
59. Effects of dodecaboride forming metals on the properties of superhard tungsten tetraboride10.1021/acs.chemmater.8b01464 ↗
60. Effects of variable boron concentration on the properties of superhard tungsten tetraboride10.1021/jacs.7b08706 ↗
61. Boron-dependency of molybdenum boride electrocatalysts for the hydrogen evolution reaction10.1002/anie.201611756 ↗
62. Nanoscaled metal borides and phosphides: Recent developments and perspectives10.1021/cr400020d ↗
63. Beyond the compositional threshold of nanoparticle-based materials10.1021/acs.accounts.7b00429 ↗
64. In situ solid-gas reactivity of nanoscaled metal borides from molten salt synthesis10.1021/acs.inorgchem.7b01279 ↗
65. Semiconductor-insulator transition in a YbB6 nanowire with boron vacancy10.1016/j.jssc.2018.03.029 ↗
66. Low-temperature synthesis and electronic transport of topological insulator SmB6 nanowires10.1039/c6ce01250g ↗
67. A simple, general synthetic route toward nanoscale transition metal borides10.1002/adma.201704181 ↗
68. Ternary borides Cr2AlB2, Cr3AlB4, and Cr4AlB6 : The first members of the series (CrB2)n CrAl with n = 1, 2, 3 and a unifying concept for ternary borides as MAB-phases10.1021/acs.inorgchem.5b00049 ↗
69. Partial etching of Al from MoAlB single crystals to expose catalytically active basal planes for the hydrogen evolution reaction10.1021/acs.chemmater.7b02511 ↗
70. First demonstration of possible two-dimensional MBene CrB derived from MAB phase Cr2AlB210.1016/j.jmst.2018.02.024 ↗
71. Discovery of intermetallic compounds from traditional to machine-learning approaches10.1021/acs.accounts.7b00490 ↗