In order to explore the deformation law of nanoindentation dislocation on different crystal planes 6H-SiC by cube indenter at high temperature, (0001), (11¯00) and (21¯1¯0) were simulated molecular dynamics, changes shear stress under analyzed. With deepening indentation depth, formation dislocations surfaces has a certain repeatability. The plane (0001) continuously generates horizontal around...

The objective of this study was to investigate the correlation between CT depth, indentation depth determined by a new hardness tester (Cariotester), and the transverse microradiography (TMR) parameters, i.e., lesion depth and mineral loss. For that purpose, this study evaluated the feasibility of using Cariotester as a root caries diagnostic system and capability of Cariotester to detect effec...

In this research, the hardness and reduced modulus of Al-%wt.12-%wt.0.5Sb melt-spun alloy were evaluated by using depth sensing indentation atomic force microscopy techniques. We considered two approaches, Oliver-Pharr Work Indentation, to analyse load-displacement curves. The ratio final maximum was found be higher than reported critical value 0.70, which mean that pile-up dominant in melt-spu...

Knowledge of brain tissue mechanical properties may be critical for formulating hypotheses about traumatic brain injury (TBI) mechanisms and for accurate TBI simulations. To determine the local mechanical properties of anatomical subregions within the rat hippocampus, the atomic force microscope (AFM) was adapted for use on living brain tissue. The AFM provided advantages over alternative metho...

Mannobiose-modified polyethylenimines (PEI) are used in gene therapy to generate nanoparticles of DNA that can be targeted to the antigen-presenting cells of the immune system. We report that the sugar modification alters the DNA organization within the nanoparticles from homogenous to shell-like packing. The depth-dependent packing of DNA within the nanoparticles was probed using AFM nano-inde...

The article is devoted to modification of the impact devices Leeb hardness testers for implementation dynamic instrumented indentation method. results obtained made it possible construct a load–displacement curve using primary EMF signals and determine values dissipated elastic body energy, maximal load indentation, residual penetration depth geometric parameters region, namely contact area ind...

Recent advances in experimental characterization techniques offer unique opportunities to evaluate mechanical properties of geomaterials. In this paper, authors introduce two such techniques that have significant potential to impact geomechanics community. The technique of using Instrumented indentation testing using nano-indenter to evaluate hardness and modulus of individual sand particles is...