Development of B4C–HfB2 composites by reaction hot pressing
Source abstract
Abstract
Abstract This paper reports on the development of HfB2 reinforced B4C composite prepared through reaction hot pressing of B4C and HfO2. These composites were characterized for phase composition, microstructure, mechanical and physical properties. Full dense composites were obtained by hot pressing at 1900 °C and a pressure of 40 MPa. HfB2 phase was identified as a reaction product in the composites by XRD analysis. Hardness of all the composites was measured to be in the range of 28–35 GPa. High elastic modulus (525 GPa) and shear modulus (196 GPa) were measured for composite corresponding to 10 wt.% HfO2. Fractography of the composites indicates transgranular mode of fracture. Fracture toughness of the composites was in the range of 4–7 MPa.m1/2 which is higher than that of monolithic B4C (2.43 MPa.m1/2). Microstructural observation of crack propagation patterns indicates the major toughening mechanism as crack deflection, crack arrest and crack bridging.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (63)
Show source-provided references
1. Boron carbide — a comprehensive review10.1016/0955-2219(90)90048-K ↗
2. Synthesis and consolidation of boron carbide: a review10.1179/095066009X12506721665211 ↗
3. Hot-pressing of boron carbide10.1016/0272-8842(84)90025-7 ↗
4. The structure and properties of sintered boron carbide10.1016/0022-5088(79)90095-X ↗
5. Microstructural coarsening during sintering of boron carbide10.1111/j.1151-2916.1989.tb06252.x ↗
6. The influence of carbon on the microstructure and mechanical properties of sintered boron carbide10.1016/0022-5088(81)90195-8 ↗
7. Structure and properties of B4C–SiC composites10.1007/s11106-005-0080-8 ↗
8. Dense sintered boron carbide containing beryllium carbide
9. Processing and mechanical properties of boron carbide sintered with TiC10.1016/S0955-2219(98)00071-5 ↗
10. Microstructure and mechanical properties of hot-pressed B4C/(W, Ti)C ceramic composites10.1016/S0272-8842(01)00113-4 ↗
11. Mechanical properties of Hot-pressed B–B4C materials10.1111/j.1151-2916.1979.tb19042.x ↗
12. The effect of Fe addition on processing and mechanical properties of reaction infiltrated boron carbide-based composites10.1007/s10853-006-1304-0 ↗
13. Processing of boron carbide–aluminum composites10.1111/j.1151-2916.1989.tb06216.x ↗
14. Production and properties of impact-resistant composites based on boron carbide and aluminum nitride10.1007/s11106-010-9221-9 ↗
15. Property and microstructure of machinable B4C/BN nanocomposites10.4028/www.scientific.net/KEM.368-372.936 ↗
16. Reaction sintering and mechanical properties of B4C with addition of ZrO210.1557/JMR.2000.0349 ↗
17. The effect of Ti and TiO2 additions on the pressureless sintering of B4C10.1007/s11661-999-0230-6 ↗
18. Boron carbide–zirconium boride in situ composites by the reactive pressureless sintering of boron carbide–zirconia mixtures10.1111/j.1151-2916.2001.tb00714.x ↗
19. In situ synthesis and densification of submicrometer-grained B4C–TiB2 composites by pulsed electric current sintering10.1016/j.jeurceramsoc.2010.10.028 ↗
20. High strength-high toughness B4C–TiB2 composites10.1023/A:1006766910536 ↗
21. Synthesis and properties of hot pressed B4C–TiB2 ceramic composite10.1016/j.msea.2010.07.101 ↗
22. Synthesis and physicomechanical properties of B4C–VB2 composites10.1007/s11106-006-0041-x ↗
23. Effect of zirconia addition on pressureless sintering of boron carbide10.1016/j.ceramint.2007.04.017 ↗
24. B4C/metal boride composites derived from B4C/metal oxide mixtures10.1016/j.jeurceramsoc.2006.04.042 ↗
25. Pressureless sintering of zirconium diboride using boron carbide and carbon additions10.1111/j.1551-2916.2007.01936.x ↗
26. Boron carbide as a potential inert matrix: an evaluation10.1016/S0149-1970(00)00113-X ↗
27. Pressureless sintering of boron carbide-based superhard materials10.4028/www.scientific.net/SSP.159.145 ↗
28. ASTM E562–11, Standard test method for determining volume fraction by systematic manual point count.
29. A critical evaluation of indentation techniques for measuring fracture toughness: I, direct crack measurements10.1111/j.1151-2916.1981.tb10320.x ↗
30. Barin · 1995
31. Chemical reactivities of hafnium and its derived boride, carbide and nitride compounds at relatively mild temperature10.1023/B:JMSC.0000041699.31019.03 ↗
32. Manufacture of powders of technical titanium, zirconium, chromium, and tungsten borides by the boron carbide method
33. B4C–TiB2 composites via reactive hot pressing10.1515/HTMP.2009.28.5.277 ↗
34. Synthesis of TiB2 by borothermic/carbothermic reduction of TiO2 with B4C10.1111/j.1551-2916.1988.tb00287.x ↗
35. High strength B4C–TiB2 composites fabricated by reaction hot-pressing10.1016/S0955-2219(02)00274-1 ↗
36. Effect of in situ synthesized TiB2 on the reaction between B4C and Al in a vacuum infiltrated B4C–TiB2–Al composite10.1007/s10853-009-3466-z ↗
37. Preparation of ZrB2 powder10.1111/j.1151-2916.1995.tb08696.x ↗
38. Boron carbides of various compositions: an improved method for X-ray characterization10.1016/0022-3115(91)90484-O ↗
39. Method for the determination of free graphite in boron carbide10.1016/0022-5088(81)90096-5 ↗
40. Raman spectrum of graphite10.1063/1.1674108 ↗
41. Dynamic indentation response of fine-grained boron carbide10.1111/j.1551-2916.2007.01652.x ↗
42. Pressureless sintering of boron carbide10.1111/j.1151-2916.2003.tb03498.x ↗
43. Effect of oxygen contamination on densification of TiB210.1111/j.1151-2916.1987.tb05699.x ↗
44. Pressureless densification of zirconium diboride with boron carbide additions10.1111/j.1551-2916.2006.00949.x ↗
45. Pressureless sintering of zirconium diboride: particle size and additive effects10.1111/j.1551-2916.2007.02169.x ↗
46. Investigations on synthesis of HfB2 and development of a new composite with TiSi210.1016/j.ijrmhm.2009.09.005 ↗
47. Microstructure and mechanical properties of hot-pressed B4C/TiC/Mo ceramic composites10.1016/j.ceramint.2008.02.014 ↗
48. Mechanical and electrical properties of B4C–CrB2 ceramics fabricated by liquid phase sintering10.1016/S0272-8842(02)00120-7 ↗
49. Reactive and dense sintering of reinforced-toughened B4C matrix composites10.1016/j.materresbull.2004.05.011 ↗
50. Improvements of the microstructure and erosion resistance of boron carbide with additives10.1023/A:1004888522607 ↗
51. Strengthening and toughening of boride and carbide hard material composites10.1016/0025-5416(88)90485-5 ↗
52. Reactive synthesis of ceramic matrix composites under pressure10.1016/S0272-8842(00)00007-9 ↗
53. 4.16 — In situ reinforced ceramics
54. Reaction hot-pressing studies of high density oxide–carbide composite ceramics10.1016/0263-4368(92)90069-E ↗
55. Sarkar, R., Das, S. K., Banerjee, G., Effect of additives on the densification of reaction sintered and presynthesised spinels. Ceram Int, 29: 55–59.10.1016/S0272-8842(02)00089-5 ↗
56. Improvements in mechanical properties of TiB2 by the dispersion of B4C particles10.1007/BF00714078 ↗
57. Interaction in the system B4C–HfB2
58. Pressureless densification and mechanical properties of hafnium diboride doped with B4C: from solid state sintering to liquid phase sintering10.1016/j.jeurceramsoc.2010.04.033 ↗
59. Indentation of brittle materials
60. Microcracking in B4C–TiB2 composites10.1111/j.1151-2916.1995.tb08671.x ↗
61. Toughening of a particulate-reinforced ceramic-matrix composite by thermal residual stress10.1111/j.1151-2916.1990.tb05209.x ↗
62. Brittle fracture and toughening mechanisms in ceramics10.1146/annurev.ms.14.080184.002105 ↗
63. Crack deflection processes-II. Experiment10.1016/0001-6160(83)90047-0 ↗