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Challenges of Engineering Grain Boundaries in Boron-Based Armor Ceramics
- Source :
- JOM. 68:1605-1615
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- Boron-based ceramics are appealing for lightweight applications in both vehicle and personnel protection, stemming from their combination of high hardness, high elastic modulus, and low density as compared to other ceramics and metal alloys. However, the performance of these ceramics and ceramic composites is lacking because of their inherent low fracture toughness and reduced strength under high-velocity threats. The objective of the present article is to briefly discuss both the challenges and the state of the art in experimental and computational approaches for engineering grain boundaries in boron-based armor ceramics, focusing mainly on boron carbide (B4C) and boron suboxide (B6O). The experimental challenges involve processing these ceramics at full density while trying to promote microstructure features such as intergranular films to improve toughness during shock. Many of the computational challenges for boron-based ceramics stem from their complex crystal structure which has hitherto complicated the exploration of grain boundaries and interfaces. However, bridging the gaps between experimental and computational studies at multiple scales to engineer grain boundaries in these boron-based ceramics may hold the key to maturing these material systems for lightweight defense applications.
- Subjects :
- 010302 applied physics
Toughness
Materials science
Metallurgy
General Engineering
chemistry.chemical_element
02 engineering and technology
Boron carbide
021001 nanoscience & nanotechnology
Microstructure
01 natural sciences
chemistry.chemical_compound
Fracture toughness
chemistry
visual_art
0103 physical sciences
visual_art.visual_art_medium
General Materials Science
Grain boundary
Ceramic
Boron suboxide
0210 nano-technology
Boron
Subjects
Details
- ISSN :
- 15431851 and 10474838
- Volume :
- 68
- Database :
- OpenAIRE
- Journal :
- JOM
- Accession number :
- edsair.doi...........70badfb9b4f8b2b67198e92a33fedad5