Fracture toughness of diamondlike carbon coatings Academic Article

abstract

• The fracture behavior of diamondlike carbon (DLC) coatings on Si substrates has been examined using microindentation. The presence of DLC coatings reduces the radial crack length to less than one-half the crack length observed in uncoated Si at the same indenter load. A total work of fracture analysis of the radial cracks formed in the DLC-coating/Si-substrate system gives 10.1 MPa m1/2 as the average fracture toughness for DLC alone. A bond-breaking calculation for DLC suggests that the elastic limit fracture toughness should be 1.5 MPa (m)1/2. The higher value obtained from experiment and total work analysis suggests that plastic work and/or a tortuous path crack evolution occurred during DLC fracture process.

authors

• Nastasi, Michael

published proceedings

• Journal of Materials Research

author list (cited authors)

• Nastasi, M., Kodali, P., Walter, K. C., Embury, J. D., Raj, R., & Nakamura, Y.

citation count

• 41

complete list of authors

• Nastasi, M||Kodali, P||Walter, KC||Embury, JD||Raj, R||Nakamura, Y

publication date

• May 1999

publisher

• Springer Nature  Publisher

published in

• Journal of Materials Research  Journal

Digital Object Identifier (DOI)

• 10.1557/jmr.1999.0293

start page

• 2173

end page

• 2180

volume

• 14

issue

• 5

URL

• http://dx.doi.org/10.1557/jmr.1999.0293