Enhanced fracture toughness of boron carbide from microalloying and nanotwinning
Scripta Materialia, ISSN: 1359-6462, Vol: 162, Page: 306-310
2019
- 26Citations
- 23Captures
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Article Description
Fracture toughness is one of the most important mechanical properties of structural materials. Particularly, enhancing the fracture toughness of super-hard materials is essential for their applications. Here, we applied density functional theory to examine how the microalloying and nanotwinning affect the fracture toughness of superhard boron carbide (B 4 C). We find that replacing C-B-C chains with two-atom chains especially weakly coupled O atoms can significantly improve the fracture toughness of B 4 C. In addition, inserting nanotwins can significantly enhance the fracture toughness of B 4 C and boron phases. Our results provide useful information to design boron based superhard materials with enhanced fracture toughness.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S1359646218307164; http://dx.doi.org/10.1016/j.scriptamat.2018.11.035; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85056987265&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S1359646218307164; https://api.elsevier.com/content/article/PII:S1359646218307164?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:S1359646218307164?httpAccept=text/plain; https://dul.usage.elsevier.com/doi/; https://dx.doi.org/10.1016/j.scriptamat.2018.11.035
Elsevier BV
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