skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: The Role of Substrate Plasticity on the Tribological Behavior of Diamond-like Nanocomposite Coatings.

Abstract

Abstract not provided.

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1148028
Report Number(s):
SAND2007-3212J
523018
DOE Contract Number:
DE-AC04-94AL85000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Acta Materialia; Related Information: Proposed for publication in Acta Materialia.
Country of Publication:
United States
Language:
English

Citation Formats

Michael, Joseph R., Jungk, John M., and Prasad, Somuri V. The Role of Substrate Plasticity on the Tribological Behavior of Diamond-like Nanocomposite Coatings.. United States: N. p., 2007. Web.
Michael, Joseph R., Jungk, John M., & Prasad, Somuri V. The Role of Substrate Plasticity on the Tribological Behavior of Diamond-like Nanocomposite Coatings.. United States.
Michael, Joseph R., Jungk, John M., and Prasad, Somuri V. Tue . "The Role of Substrate Plasticity on the Tribological Behavior of Diamond-like Nanocomposite Coatings.". United States. doi:.
@article{osti_1148028,
title = {The Role of Substrate Plasticity on the Tribological Behavior of Diamond-like Nanocomposite Coatings.},
author = {Michael, Joseph R. and Jungk, John M. and Prasad, Somuri V.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {Acta Materialia},
number = ,
volume = ,
place = {United States},
year = {Tue May 01 00:00:00 EDT 2007},
month = {Tue May 01 00:00:00 EDT 2007}
}
  • In this study we have deposited silver-containing hydrogenated and hydrogen-free diamond-like carbon (DLC) nanocomposite thin films by plasma immersion ion implantation-deposition methods. The surface and nano-tribological characteristics were studied by x-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and nano-scratching experiments. The silver doping was found to have no measurable effect on sp2-sp3 hybridization of the hydrogenated DLC matrix and only a slight effect on the hydrogen-free DLC matrix. The surface topography was analyzed by surface imaging. High- and low-order roughness determined by AFM characterization was correlated to the DLC growth mechanism and revealed the smoothing effect of silver. Themore » nano-tribological characteristics were explained in terms of friction mechanisms and mechanical properties in correlation to the surface characteristics. It was discovered that the adhesion friction was the dominant friction mechanism; the adhesion force between the scratching tip and DLC surface was decreased by hydrogenation and increased by silver doping.« less
  • In this study, hard coatings (TiN, TiCN, CrN, and CrCN) and Me-DLC coatings (Ti{sub x%}-C:H and Cr{sub x%}-C:H) were deposited on tungsten carbide (WC) substrate by multiarc physical vapor deposition (MAPVD) and unbalanced magnetron (UBM) sputtering, respectively. Counterbodies of the AISI 1045 steel cylinder and the AA7075T65l aluminum cylinder were used in the cylinder-on-disk, line-contact wear mode under dry condition; a counterbody of the AISI 51200 steel ball was used in the ball-on-disk, point-contact wear mode, under both dry and lubricated conditions. All wear tests were conducted with a reciprocating machine. After the tests, the most suitable coating for variousmore » counterbodies and test environments was selected. For the coating/1045 steel cylinder, the Ti{sub 10%}-C:H coating possesses excellent tribological characteristics. For the coating/7075T651 aluminum cylinder, hard coatings display excellent wear resistance. For the coating/steel ball, CrCN and CrN coatings display very little wear under both dry and lubricated conditions. On TiN and TiCN coatings, special wear mechanisms of material transfer, adhesion wear, and fatigue fracture occurred during initial tests under kerosene lubrication.« less
  • Advanced TiC/a-C:H nanocomposite coatings have been produced via reactive deposition in a closed-field unbalanced magnetron sputtering system (Hauzer HTC-1200). These wear-resistant coatings are targeted for automotive applications where high load-bearing capacity and thermal stability, low friction, and wear resistance are the primary requirements. In this article the tribological behavior of the nanocomposite coatings is scrutinized by means of ball-on-disk tribotests at elevated temperature or after annealing in the temperature range of 150-400 deg. C. The thermal stability of the coatings in terms of critical temperatures, at which the degradation of wear resistance and friction of the coatings starts, is monitoredmore » with depth profiling of oxygen content using Auger spectroscopy in conjunction with detailed examinations of the mechanical properties of the annealed coatings. A striking result is that a coating thermally stable up to 350 deg. C may fail at much lower temperatures during elevated-temperature tribotests. The origin of failure is attributed to the interfacial delamination due to the discontinuity in mechanical properties between the coatings and substrates at elevated temperatures. It indicates a stringent requirement to optimize the interlayer of advanced tribological coatings developed for high temperature applications.« less
  • Abstract not provided.