Q-carbon harder than diamond

Jagdish Narayan; Siddharth Gupta; Anagh Bhaumik; Ritesh Sachan; Filippo Cellini; Elisa Riedo

doi:10.1557/mrc.2018.35

Q-carbon harder than diamond

Jagdish Narayan, Siddharth Gupta, Anagh Bhaumik, Ritesh Sachan, Filippo Cellini, Elisa Riedo

Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

A new phase of carbon named Q-carbon is found to be over 40% harder than diamond. This phase is formed by nanosecond laser melting of amorphous carbon and rapid quenching from the super-undercooled state. Closely packed atoms in molten metallic carbon are quenched into Q-carbon with 80-85% sp³ and the rest sp². The number density of atoms in Q-carbon can vary from 40% to 60% higher than diamond cubic lattice, as the tetrahedra packing efficiency increases from 70% to 80%. Using this semiempirical approach, the corresponding increase in Q-carbon hardness is estimated to vary from 48% to 70% compared to diamond.

Original language	English (US)
Pages (from-to)	428-436
Number of pages	9
Journal	MRS Communications
Volume	8
Issue number	2
DOIs	https://doi.org/10.1557/mrc.2018.35
State	Published - Jun 1 2018

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1557/mrc.2018.35

Cite this

@article{3c898f22579349c4bc526877cba7a9b0,

title = "Q-carbon harder than diamond",

abstract = "A new phase of carbon named Q-carbon is found to be over 40% harder than diamond. This phase is formed by nanosecond laser melting of amorphous carbon and rapid quenching from the super-undercooled state. Closely packed atoms in molten metallic carbon are quenched into Q-carbon with 80-85% sp3 and the rest sp2. The number density of atoms in Q-carbon can vary from 40% to 60% higher than diamond cubic lattice, as the tetrahedra packing efficiency increases from 70% to 80%. Using this semiempirical approach, the corresponding increase in Q-carbon hardness is estimated to vary from 48% to 70% compared to diamond.",

author = "Jagdish Narayan and Siddharth Gupta and Anagh Bhaumik and Ritesh Sachan and Filippo Cellini and Elisa Riedo",

note = "Publisher Copyright: {\textcopyright} Copyright Materials Research Society 2018.",

year = "2018",

month = jun,

day = "1",

doi = "10.1557/mrc.2018.35",

language = "English (US)",

volume = "8",

pages = "428--436",

journal = "MRS Communications",

issn = "2159-6859",

publisher = "Cambridge University Press",

number = "2",

}

TY - JOUR

T1 - Q-carbon harder than diamond

AU - Narayan, Jagdish

AU - Gupta, Siddharth

AU - Bhaumik, Anagh

AU - Sachan, Ritesh

AU - Cellini, Filippo

AU - Riedo, Elisa

PY - 2018/6/1

Y1 - 2018/6/1

N2 - A new phase of carbon named Q-carbon is found to be over 40% harder than diamond. This phase is formed by nanosecond laser melting of amorphous carbon and rapid quenching from the super-undercooled state. Closely packed atoms in molten metallic carbon are quenched into Q-carbon with 80-85% sp3 and the rest sp2. The number density of atoms in Q-carbon can vary from 40% to 60% higher than diamond cubic lattice, as the tetrahedra packing efficiency increases from 70% to 80%. Using this semiempirical approach, the corresponding increase in Q-carbon hardness is estimated to vary from 48% to 70% compared to diamond.

AB - A new phase of carbon named Q-carbon is found to be over 40% harder than diamond. This phase is formed by nanosecond laser melting of amorphous carbon and rapid quenching from the super-undercooled state. Closely packed atoms in molten metallic carbon are quenched into Q-carbon with 80-85% sp3 and the rest sp2. The number density of atoms in Q-carbon can vary from 40% to 60% higher than diamond cubic lattice, as the tetrahedra packing efficiency increases from 70% to 80%. Using this semiempirical approach, the corresponding increase in Q-carbon hardness is estimated to vary from 48% to 70% compared to diamond.

UR - http://www.scopus.com/inward/record.url?scp=85044249808&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85044249808&partnerID=8YFLogxK

U2 - 10.1557/mrc.2018.35

DO - 10.1557/mrc.2018.35

M3 - Article

AN - SCOPUS:85044249808

SN - 2159-6859

VL - 8

SP - 428

EP - 436

JO - MRS Communications

JF - MRS Communications

IS - 2

ER -

Q-carbon harder than diamond

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this