Our news editors obtained a quote from the research, "Both the power law (a paraboloid punch approximation) and the quadratic polynomial (conical indenter approximation) were employed to analyze the unloading portions of the resultant load-displacement curve. It was found that, when the examined contact depth is smaller then the thickness of the ion-implanted layer, the determined power law exponent, m, is much larger than 1.5, the theoretical value for a paraboloid punch. This phenomenon may be attributed mainly to the effect of the residual surface stresses associated with the ion implantation."
According to the news editors, the research concluded: "The hardness and Young's modulus of the ion-implanted sample were found to exhibit a graded distribution and have maxima when the contact depth is comparable to the average projected range of the implanted ions."
For more information on this research see: Nanoindentation characterization of tetragonal zirconia polycrystalline implanted by titanium ions with MEVVA sources. Materials Chemistry and Physics, 2014;147(1-2):268-272. Materials Chemistry and Physics can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne,
The news editors report that additional information may be obtained by contacting
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