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Studies from J.H. Gong and Co-Authors Have Provided New Information about Nanoindentation (Nanoindentation characterization of tetragonal zirconia...

August 12, 2014



Studies from J.H. Gong and Co-Authors Have Provided New Information about Nanoindentation (Nanoindentation characterization of tetragonal zirconia polycrystalline implanted by titanium ions with MEVVA sources)

By a News Reporter-Staff News Editor at Physics Week -- Current study results on Nanoindentation have been published. According to news reporting originating from Shanghai, People's Republic of China, by VerticalNews correspondents, research stated, "The applicability and the reliability of the traditional power-law proposed by Oliver and Pharr in describing the nanoindentation unloading behavior of the ion-implanted samples were examined in this paper. Nanoindentation tests were conducted on a tetragonal zirconia polycrystalline (TZP) ceramic implanted by titanium ions with metal vapor vacuum-arc (MEVVA) sources."

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, Switzerland. (Elsevier - www.elsevier.com; Materials Chemistry and Physics - www.elsevier.com/wps/product/cws_home/504097)

The news editors report that additional information may be obtained by contacting J.H. Gong, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, People's Republic of China. Additional authors for this research include Z.J. Peng and D.Y. Jiang.

Keywords for this news article include: Asia, Physics, Shanghai, Titanium, Power Law, Light Metals, Nanotechnology, Nanoindentation, Emerging Technologies, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Physics Week


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