Functionally Graded Boron Carbide

Petrovic, J. J.; McClellan, K. J.; Kise, C. D.; Hoover, R. C.; Scarborough, W. K.

doi:10.1002/9780470294499.ch46

Cited by 4 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…273 Graded porosity B 4 C materials can be produced by a layering approach using different size distributions of B 4 C powders in the green state, and then densifying the layered assembly by hot pressing at 1900uC. 274 Cobalt as sinter additive has also been attempted for hot pressing of boron carbide powders with 5 wt-%TiC at temperatures ,1500uC and a high pressure of 5-6 GPa. 275…”

Section: Liquid Phase Sinteringmentioning

confidence: 99%

Synthesis and consolidation of boron carbide: a review

Suri

Subramanian

Sonber

et al. 2010

International Materials Reviews

618

290

View full text Add to dashboard Cite

Boron carbide is a strategic material, finding applications in nuclear industry, armour for personnel and vehicle safety, rocket propellant, etc. Its high hardness makes it suitable for grinding and cutting tools, ceramic bearing, wire drawing dies, etc. Boron carbide is commercially produced either by carbothermic reduction of boric acid in electric furnaces or by magnesiothermy in presence of carbon. Since many specialty applications of boron carbide require dense bodies, its densification is of great importance. Hot pressing and hot isostatic pressing are the main processes employed for densification. In the recent past, various researchers have made attempts to improve the existing methods and also invent new processes for synthesis and consolidation of boron carbide. All the techniques on synthesis and consolidation of boron carbide are discussed in detail and critically reviewed.

show abstract

Section: Liquid Phase Sinteringmentioning

confidence: 99%

Synthesis and consolidation of boron carbide: a review

Suri

Subramanian

Sonber

et al. 2010

International Materials Reviews

618

290

View full text Add to dashboard Cite

show abstract

“…These applications take advantage of its extreme hardness, neutronic absorption and relatively low cost 1,2 . In addition, over the last 30 years it has been demonstrated that hot‐pressed B 4 C, among other high performance ceramics, has outstanding ballistic armor properties because of its high hardness, low density and high Hugoniot elastic limit 3–6 . In particular, its extremely low density makes it very attractive for armor applications where weight is critical 3 …”

Section: Introductionmentioning

confidence: 99%

Microstructural Characterization of Commercial Hot‐Pressed Boron Carbide Ceramics

Chen

McCauley

LaSalvia

et al. 2005

Journal of the American Ceramic Society

139

View full text Add to dashboard Cite

Two commercial hot-pressed boron carbide ceramics were investigated by transmission electron microscopy. Atomic-scale observations suggest that the grain boundaries of the two materials are free of grain-boundary films. Two triple-junction phases were found and characterized to be rhombohedral Fe 2 B 103 and orthorhombic Ti 3 B 4 . In addition, intra-granular precipitates, AlN, Mo 2 (C, B) and graphite, were identified and found to have coherent relationships with the boron carbide matrix. Micron-scale inclusions were also observed and most of them were determined to be graphite. The formation mechanisms of the secondary phases and their possible influence on mechanical properties are also discussed. II. Experimental ProcedureTwo commercial hot-pressed B 4 C samples, nominally E and F, were used in the present study. The general properties of the two 1935 J ournal

show abstract

“…Boron carbide is an important special engineering ceramic material which has excellent physical and mechanical properties. Boron carbide is a promising material for a variety of applications that require elevated mechanical properties, such as high hardness (29.1GPa, the only substances harder than boron carbide are diamond and cubic boron nitride), low theoretical density (2.52g/cm 3 ), high elastic modulus (448GPa), chemical inertness, high neutron absorption cross-section (600barns) [1][2][3], etc. Because boron carbide is a compound of strong covalent bond, there is an extremely high sintering temperature required for full densification.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Al2O3 as a Sintering Aid on the Densification of B4C by Spark Plasma Sintering

Jiang

Sun

et al. 2012

AMR

View full text Add to dashboard Cite

The effect of the Al2O3 additive on the densification behavior, microstructure and mechanical properties of the B4C–xwt%Al2O3 composites sintered by means of spark plasma sintering (SPS) process were investigated. It was found that addition of Al2O3 improve the sinterability of B4C at temperatures between 1700 and 1800°C remarkably. The composite samples which with an addition of 4 wt% Al2O3 and sintering at 1750°C exhibits excellent mechanical properties (relative density: 98.82%, hardness: 90.6 HRA).

show abstract

Functionally Graded Boron Carbide

Cited by 4 publications

References 1 publication

Synthesis and consolidation of boron carbide: a review

Synthesis and consolidation of boron carbide: a review

Microstructural Characterization of Commercial Hot‐Pressed Boron Carbide Ceramics

The Effect of Al<sub>2</sub>O<sub>3</sub> as a Sintering Aid on the Densification of B<sub>4</sub>C by Spark Plasma Sintering

Contact Info

Product

Resources

About