Crazing resistance
ESC and polymer resistance to ESC (ESCR) have been studied for several decades. Research shows that the exposure of polymers to liquid chemicals tends to accelerate the crazing process, initiating crazes at stresses that are much lower than the stress causing crazing in air. The action of either a tensile stress or a corrosive liquid alone would not be enough to cause failure, but in ESC the initiation and growth of a crack is caused by the combined action of the stress and a co… WebMay 1, 1998 · Products like medical luers can be susceptible to crazing when under stress and exposed to aggressive chemicals. Photo: Eastman Chemical Co. ... Obviously, the most reliable method for evaluating the stress-crack resistance of a plastic in a given application is to analyze its performance under simulated end-use conditions. Alternatively ...
Crazing resistance
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Crazing is the phenomenon that produces a network of fine cracks on the surface of a material, for example in a glaze layer. Crazing frequently precedes fracture in some glassy thermoplastic polymers. As it only takes place under tensile stress, the plane of the crazing corresponds to the stress … See more Crazing occurs in polymers, because the material is held together by a combination of weaker Van der Waals forces and stronger covalent bonds. Sufficient local stress overcomes the Van der Waals force, allowing a … See more Crazing is also used as a term in odontology to describe fine cracks in the enamel of teeth. See more The root sense of the word crazy in English, meaning “to shatter, crush, or break,” dates to the 1300s. The metaphorical … See more Crazing is also seen on single ply roofing membranes, joint sealant, and on concrete when good concrete practices are not followed. See more Crazing is a glaze defect of glazed pottery. Characterised as a spider web pattern of cracks penetrating the glaze, it is caused by tensile stresses greater than the glaze is able to withstand. In pottery a distinction is often made between crazing, as an accidental defect, … See more • Understanding Crazing • Crazing Concrete Surfaces Archived 2006-05-17 at the Wayback Machine • Images of crazing via Google Images (look for the images of fine 'cracks') See more WebGlaze crazing or glaze crackle is a network of lines or cracks in the fired glazed surface. It happens when a glaze is under tension. A craze pattern can develop immediately after removal from the kiln or years later. We …
WebCeramic tiles — Part 11: Determination of crazing resistance for glazed tiles. This standard was last reviewed and confirmed in 2024. Therefore this version remains current. Defines … Webstandard test method for crazing resistance of fired glazed whitewares by autoclave treatment A description is not available for this item. Click here to skip or ad will close in …
WebChemical resistance testing is carried out by immersing samples in various test fluids. The type of chemical reagents to be used are specified in applicable standards to reflect the … Weblow-humidity environments and causes crazing. Some sealing methods, such as low-nickel seal and no-nckel seal, can result in higher crazing resistance of the coating than hot …
WebAs long as the specimens do not show crazing, they are heated and quenched repeatedly for three cycles at oven temperatures which are increased by increments of 25°F until a …
WebJul 11, 2014 · A procedure is described for evaluating crazing resistance and from the results of crazing resistance measurements the following conclusions were … oilcloth tablecloth starsWebPolycarbonate (PC) is susceptible to environmental stress cracking (ESC) when the conditions of pre-strain and presence of fluid with a compatible solubility index are both prevalent. One approach to counter this involves using nanoscale fillers to bridge the propagating microcracks, thus, effectively inhibiting impending failure. In this work, we … oilcloth tablecloths cut to sizeWebNov 6, 2010 · Frost resistance is the property that a material can withstand several freeze-thaw cycles without being destroyed and its strength does not decrease seriously when the material absorbs water to saturation. It is expressed by frost-resistant level. oilcloth tentWebAug 1, 2007 · In general, the enamel layer of artificial teeth is expected to have crazing, solvent degradation, and wear-resistance properties, while the ridge lap portion is expected to be cross-linked the least possible amount to provide good bonding with the denture base resin. 1, 2 Conventional acrylic resin and cross-linked acrylic resin artificial ... oil club northern irelandWebJan 2, 2024 · Subscribe 1.2K views 3 years ago Ceramic Crazing Resistance Tester determines the crazing resistance of glazed ceramic tableware articles in contact with food with water … oil column heater delonghiWebDefines a test method for determining the crazing resistance of all glazed ceramic tiles except when the crazing is an inherent decorative feature of the product. General information Status : Published Publication date : 1994-08 Edition : 1 Number of pages : 3 Technical Committee : ISO/TC 189 Ceramic tile ICS : 91.100.23 Ceramic tiles my insurance premium is a posWebNov 5, 2024 · Crazing refers to a network of visual cracks on a coated metallic surface. It occurs due to tension stresses in some glassy thermoplastic polymers. Crazing is … oilcloth tablecloths round denver