Powder blasting, or Abrasive Jet Machining (AJM), is a technique in which a particle jet is directed towards a target for mechanical material removal. It is a fast, cheap and accurate directional etch technique for brittle materials like glass, silicon and ceramics. By introducing electroplated copper as a new mask material, the feature size of this process was decreased. It was found that blas...

Introduction: Impact structures are unlike most geologic features because there commonly is little or no surface manifestation of their complex crater-filling stratigraphy. Further, many impact structures lie completely buried by as much as several hundred meters of sediment. Frequently, the only means of accessing tangible material from within such structures is by drilling. Of the 172 proven ...

The objectives of this study were to characterize change in surface properties of tetragonal zirconia polycrystals (TZP) after hydrophilic treatment, and to determine the effect of such changes on initial attachment of osteoblast-like cells. Roughened surfaces were produced by alumina-blasting and acid-etching. Hydrophilic treatment comprised application of immediately after blasting and acid-e...

Preliminary notes This paper aims to establish the parameters of optimization and geometrical improvements for the micro-geometry of solid carbide drills through the application of sand blasting process. The effects of sand blasting over the cutting edge and also upon the micro geometry of the tool body are to be taken into consideration. This process is one of the most common ones used in the ...

This paper presents work in progress on an approach to the problem of recognizing blasting caps in x-ray images. An analysis of functional properties of blasting caps was used to design the representation space, which combines intensity and shape features. Recognition proceeds in two phases. The rst phase is a bottom-up process in which low intensity blobs are used as attention-catching devices...

The effect of a blasting vibration from an excavating tunnel on adjacent excavated is great importance for the stability and security twin tunnels. Due to relatively small distance between face concrete lining tunnel, impact could be significant should considered in practical project. In order control scales during excavation one minimize one, research based field-blasting tests performed tunne...

In the process of tunnel excavation, blasting technology is one commonly used excavation methods. The mainly divided into smooth and presplitting blasting. blasting, in order to prevent excessive damage caused by explosive often carried out means uncoupled charging. previous studies, blast hole were placed concentrically, while actual engineering, charge exists form eccentricity. this study, LS...

Blasting lumpiness prediction is one of the most important research contents in engineering blasting. Although traditional KUZ-RAM model widely used, it often overestimates size Therefore, was updated or corrected this paper by simplifying difficult problem statistical burst fragmentation LS-DYNA. Based on theory area measurement method, fitting mechanism machine learning used to study simulati...