Some Scientific Studies On Machinable Glass-Ceramics

Surface Roughness Prediction Model Of Machinable Glass-Ceramic End Milling

Advanced ceramics that can be machinable glass ceramics are attractive materials for the production of high-precision micro-components for aerospace, Many applications in various industries such as electronics, biomedical, automotive and environmental communications. Excellent high temperature performance. Many research efforts have been carried out over the past few years to investigate the performance of different machining operations when machining various advanced ceramics.

Micro end milling is one of the machining methods to meet the needs of micro parts. Selection of proper machining parameters is important to obtain a good surface finish during the machining of machinable glass-ceramics. Therefore, this paper describes the development of a predictive model of machinable glass-ceramic surface roughness in terms of speed, feed rate using a micro-end milling operation.

Mechanical Properties Of New Mica-Based Machinable Glass-Ceramics For CAD/CAM Restorations

Machinable ceramics (Vita Mark II and Dicor MGC) showed good short-term clinical performance, but long-term in vivo fracture resistance is still being monitored. The relatively low fracture toughness of currently available machinable ceramics limits their use only for conservative inlays and onlays. A new machinable glass-ceramic (MGC-F) (Corning Incorporated) has been developed with enhanced fluorescence and machinability.

The purpose of this study was to characterize and compare the key mechanical properties of MGC-F with Dicor MGC-Light, Dicor MGC-Dark and Vita Mark II glass-ceramics. The mean fracture toughness and serrated biaxial flexural strength of MGC-F were significantly higher (p < or = 0.01) than the Dicor MGC-Light, Dicor MGC-Dark and Vita Mark II ceramic materials. The results of this study demonstrate that MGC-F has better fracture resistance in vivo compared to existing machinable ceramic materials for CAD/CAM restorations.

Dynamic Fatigue Of Machinable Glass-Ceramics

To evaluate the stress corrosion susceptibility of machinable glass-ceramics, their dynamic fatigue behavior was investigated by measuring their strength as a function of stress rate. Fracture mechanics techniques were used to analyze the results with the aim of making life predictions for components of this material. It was concluded that this material has only moderate stress corrosion resistance (N = 30) under ambient conditions. For the materials used in this study, the effect of specimen size on strength was evaluated; it was concluded that Weibull’s edge defect scaling law adequately describes the observed strength-dimension relationship.

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Manufacturer of precision machined components. Ceramic cnc machining components include high dielectric strength, electrical & corrosion resistance, & non-porous & non-shrinking properties.Manufacturer of high temperature fabricated and machinable ceramics including alumina, glass-ceramic, alumino-silicate, boron nitride and zirconium phosphate. Adhesives, coatings and potting compounds to 3200 degrees F,Air firing services for ceramics up to 1650 degrees C also available. Products include insulators, guides, washers, tubes, blocks, & rods for thermal, electrical, corrosion exposure, structural, wear, & semi-conductor operations. Services include machining to tolerances of +/- .0001, ultrasonic core drilling, centerless grinding, milling, & ID & OD threading.Surface grinding, dicing, OD (outer dia.) grinding, ID (inner dia.) grinding, centerless grinding, hole drilling, jig grinding, lapping, honing & polishing service are also available. Diamond grinding with dimensional tolerances of 5 microns & surface finishes of 0.2 microns (8 micro-in.) can be performed.Blanket orders and AutoCAD files & other 3d files accepted.Contact us for your machining ceramic project!