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Effect of Cleaning Protocols on Surface Roughness of Current Polymeric Denture Materials. [PDF]
J Funct BiomaterBrinkmann L +5 more
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Annual Reports to the ESA Council ESA 110th Annual Meeting July, 2025
The Bulletin of the Ecological Society of America, EarlyView.
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Interferometric Examination of Hardness Test Indentations
Nature, 1949BY means of multiple-beam interference methods we are carrying out a systematic examination of the distortions produced on various surfaces by standard diamond hardness indenters, including respectively (1) Vickers pyramid, (2) Rockwell cone, (3) Knoop pyramid, (4) double-cone indenter (devised by P. Grodzinski), using micro- and macro-indenters. Owing
S, TOLANSKY, D G, NICKOLS
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Calculation of Indentation Hardness Based on Indentation Energy
Advanced Materials Research, 2011Comparing advantages and disadvantages of Oliver-Pharr method, microhardness method and indentation energy method, this article propses the improvement of indentation energy method. The improvement of indentation energy method mainly takes the calculation of energy and pile-up and sink-in phenomenon into account.
L. Zhou +4 more
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On two indentation hardness definitions
Surface and Coatings Technology, 2002The difference between the contact area under load and the residual projected area of an indentation after complete unloading has been studied for various materials using finite element and dimensional analyses of cone indentation. The difference in the contact areas gives rise to two hardness values, one based on the contact area under load and ...
Zhiyong Li +3 more
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Elastic recovery at hardness indentations
Journal of Materials Science, 1981The mechanics of hardness indentation are considered. On the basis of a cycle in which the loading is elastic-plastic and the unloading (and subsequent reloading) elastic, an expression is derived for the relative depth recovery of the impression as a function of hardness/modulus,H/E. Experimental observations on indented surfaces of selected materials,
B. R. Lawn, V. R. Howes
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Indentation hardness of biomorphic SiC
International Journal of Refractory Metals and Hard Materials, 2005Vickers hardness (HV) measurements have been performed in SiC samples fabricated from various wood precursors (pine, beech, and eucalyptus): bioSiC. It was found that hardness was highly dependent on starting wood structure. The arrangement of wood cells determined the final microstructure of the bioSiC (pores distribution and SiC/Si ratio).
F. Gutierrez-Mora +4 more
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Topics in indentation hardness
Metal Science, 1982Problemes recents au sujet de la mesure de durete par indentation: comparaison de corps solides par indentation mutuelle, indentation de solides de faible module d'elasticite et de grande limite elastique, anisotropie de la durete, rupture par identation, durete et restauration elasticique, effets d ...
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Indentation Hardness of Diamond
Nature, 1956RECENTLY, S. Tolansky and V. R. Howes1 published some data on indentation compression strength with a diamond ball (0.39 mm. radius) on differently orientated diamond faces. They obtained values for the pressure which caused cracking on different diamond faces ranging from 1.2 to 1.8 × 1011 dyne-cm.−2 (1,200–1,800 kgm./mm.2).
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Indentation hardness and hot pressing
Acta Metallurgica, 1980Methods are reviewed for calculating the pressure distribution over the area of contact between spheres undergoing linear deformation. The relationship P[p(r,t)] = (4/πR)Q[(a2 − r2)12], where p is the pressure over the interface. R is the sphere radius, a is the radius of the circle of contact and r is the polar co-ordinate in the interface, holds when
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