منابع مشابه
Roughening of Ion-eroded Surfaces
Recent experimental studies focusing on the morphological properties of surfaces eroded by ion-bombardment report the observation of self-affine fractal surfaces, while others provide evidence about the development of a periodic ripple structure. To explain these discrepancies we derive a stochastic growth equation that describes the evolution of surfaces eroded by ion bombardment. The coeffici...
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It is an established assumption that eroded dental hard tissues are particularly prone to toothbrush abrasion. Only a few studies have aimed to show this for dentine and, if so, disregarded the complex histological structure of this tissue. Therefore, the present study sought (i) to investigate the effects of toothbrushing on eroded dentine and (ii) to analyze how the organic matrix influences ...
متن کاملRipple coarsening on ion beam-eroded surfaces
The temporal evolution of ripple pattern on Ge, Si, Al 2 O 3, and SiO 2 by low-energy ion beam erosion with Xe (+) ions is studied. The experiments focus on the ripple dynamics in a fluence range from 1.1 × 10(17) cm(-2) to 1.3 × 10(19) cm(-2) at ion incidence angles of 65° and 75° and ion energies of 600 and 1,200 eV. At low fluences a short-wavelength ripple structure emerges on the surface t...
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Experimental results on ion sputtered surfaces, covering amorphous and crystalline materials (SiO2 [1]), and both metals (Ag [2]) and semiconductors (Ge [3], Si [4,5]), have motivated extensive theoretical work aiming to uncover the mechanism responsible for ripple formation and kinetic roughening. A particularly successful model has been proposed by Bradley and Harper (BH) [6], in which the he...
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ژورنال
عنوان ژورنال: BMJ
سال: 1970
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.2.5710.640