Contamination profile of Printed Circuit Board Assemblies in relation
... process was used for investigation. All the PCBAs were soldered using no-clean flux systems, containing different flux systems but still belonging to WOA type. 2.2 Contamination profiling on PCBAs Visualization of contamination profile on the selected PCBAs was done using a commercial test method ca ...
... process was used for investigation. All the PCBAs were soldered using no-clean flux systems, containing different flux systems but still belonging to WOA type. 2.2 Contamination profiling on PCBAs Visualization of contamination profile on the selected PCBAs was done using a commercial test method ca ...
a-study-on-the
... be used for optical applications. FTIR analysis identified the functional groups present in the grown single crystals. From the thermal studies, it was found that the doped crystal was stable up to 200°C and hence it may be useful for laser applications. The Vicker’s micro hardness test showed that ...
... be used for optical applications. FTIR analysis identified the functional groups present in the grown single crystals. From the thermal studies, it was found that the doped crystal was stable up to 200°C and hence it may be useful for laser applications. The Vicker’s micro hardness test showed that ...
Defect accumulation behaviour in hcp metals and alloys - PolyU
... similar, being much smaller than the total displacements as estimated by NRT [15], and obeying a similar relationship. The cascade morphology is basically the same as the picture derived from the continuum diusion-reaction calculation reported a decade earlier [16], consisting of single vacancies a ...
... similar, being much smaller than the total displacements as estimated by NRT [15], and obeying a similar relationship. The cascade morphology is basically the same as the picture derived from the continuum diusion-reaction calculation reported a decade earlier [16], consisting of single vacancies a ...
Investigation of the Hysteretic Phenomena in Surface Reconstruction
... investigated and tried to explain this phenomenon [17-23]. The surface is always different from the bulk material because it tries to relax by getting to an energy minimum state and involving various surface reconstructions [24-31]. These reconstructions are dependent on the substrate temperature an ...
... investigated and tried to explain this phenomenon [17-23]. The surface is always different from the bulk material because it tries to relax by getting to an energy minimum state and involving various surface reconstructions [24-31]. These reconstructions are dependent on the substrate temperature an ...
Ferroelectric Ceramics - Universiti Sains Malaysia
... single grain, the motion of whose walls increases the dielectric constant at the Curie point. For a BaTiO3 ceramic with fine grains (~ 1 m m), a single domain forms inside each grain. The movement of domain walls are restricted by the grain boundaries, thus leading to a low dielectric constant at th ...
... single grain, the motion of whose walls increases the dielectric constant at the Curie point. For a BaTiO3 ceramic with fine grains (~ 1 m m), a single domain forms inside each grain. The movement of domain walls are restricted by the grain boundaries, thus leading to a low dielectric constant at th ...
Fireclay Refractories: Refractory fireclay consists essentially of
... Refractory fireclay consists essentially of hydrated aluminum silicates with minor proportions of other minerals. As defined by the American Society for Testing Materials (ASTM), there are five standard classes of fireclay brick: superduty, high-duty, medium-duty, low-duty and semi-silica. These cla ...
... Refractory fireclay consists essentially of hydrated aluminum silicates with minor proportions of other minerals. As defined by the American Society for Testing Materials (ASTM), there are five standard classes of fireclay brick: superduty, high-duty, medium-duty, low-duty and semi-silica. These cla ...
Superalloy
A superalloy, or high-performance alloy, is an alloy that exhibits several key characteristics: excellent mechanical strength, resistance to thermal creep deformation, good surface stability and resistance to corrosion or oxidation. The crystal structure is typically face-centered cubic austenitic. Examples of such alloys are Hastelloy, Inconel, Waspaloy, Rene alloys, Haynes alloys, Incoloy, MP98T, TMS alloys, and CMSX single crystal alloys.Superalloy development has relied heavily on both chemical and process innovations. Superalloys develop high temperature strength through solid solution strengthening. An important strengthening mechanism is precipitation strengthening which forms secondary phase precipitates such as gamma prime and carbides. Oxidation or corrosion resistance is provided by elements such as aluminium and chromium.The primary application for such alloys is in turbine engines, both aerospace and marine.