In the process, process parameters such as injection pressure, abrasive http://www.selleckchem.com/products/Enzastaurin.html particle size and density, stand-off distance and scanning times of the nozzle, and patterns shapes and size Inhibitors,Modulators,Libraries affect Inhibitors,Modulators,Libraries the machined selleck kinase inhibitor results. [10~13] In this study, the influence of the number of nozzle scanning, abrasive particle size, and pattern size on the pattern formation is investigated. Machined shapes and surface roughness are measured using a 3-dimensional vision profiler and the results are discussed.2.?Material Properties of Fused Silica GlassFused silica glass is a high purity synthetic amorphous silicon dioxide (SiO2). It can be obtained by electric arc melting high purity sand deposits at extremely high temperature (above 2000��C).
It has a highly cross linked Inhibitors,Modulators,Libraries Inhibitors,Modulators,Libraries 3-dimensional structure.
This noncrystalline, colorless, silica glass combines a very low thermal expansion Inhibitors,Modulators,Libraries coefficient with excellent optical qualities and exceptional transmittance over a wide spectral range, especially in the ultraviolet. It is resistant to scratching and thermal shock. Fused silica glass can be used for different applications and is available with various grades. One of its important applications is high energy laser optics. No other optical material matches the purity of fused silica, and therefore its ability to withstand and Inhibitors,Modulators,Libraries transmit high energy laser pulses with limited absorption or damage to the Inhibitors,Modulators,Libraries material is similarly unrivaled. Fused silica glass can also be used for biochips, lenses, and prisms in a transmission range of 0.
16��m to 3��m. Its refractive index varies from 1.55 to 1.40 through the transmission range.
Material properties of the used fused silica glass are presented in Tables 1 and and22.Table 1.Mechanical properties of fused silica glass.Table 2.Thermal properties of fused silica glass.3.?Basic principles of the Powder BlastingIn the powder Inhibitors,Modulators,Libraries blasting process, Brefeldin_A micro abrasives (tens of ��m), accelerated by highly compressed air or gases, are forced through a ceramic nozzle, and collide with a workpiece at a very high velocity (80 �C 200m/s) and density. The nozzle can be moved along the X- Carfilzomib and Y-directions to scan surface areas. The workpiece is covered with a patterned mask; thus, the open areas of the workpiece are removed by the injected abrasive particles.
Since the material removal process of powder blasting is performed by a type of brittle mode machining based on micro crack CHIR99021 supplier propagation, there is very little heat, chipping, or crack generation in the workpiece.
Thus, this method is suitable for the machining of micro shapes R115777 (such as grooves, holes, pockets, etc.) of hard and brittle materials (such as glass, ceramics, silicon, crystal, etc.). A rebounded mixture of abrasives and chips from the workpiece is sent to the distributor, which then separates the mixture into chips and abrasives for recycling.