Thermoplastic elastomers (TPEs) are block copolymers made up of ‘‘hard’’ (glassy or crystalline) and ‘‘soft’’ (rubbery) blocks that self-organize into ‘‘domain’’ structures at a length scale of a few tens of nanometers. Under typical processing conditions, TPEs also develop a ‘‘polydomain’’ structure at the micron level that is similar to that of metal polycrystals. Therefore, from a continuum ...

a study for optimizing of siliconizing and borosiliconizing processes on carbon steels has been carried out. the process parameters, i.e, time and powder mixture, were considered for optimization of the case depth, surface quality and the hardness profile. time and temperature of the processes were 4 hr and 950˚c, respectively. powder mixture in siliconizing process was 2.5% ferrosilicon, 2.5% ...

The microstructural study of edible films is of great importance because it provides information about the structural arrangement and morphology of the films. Several microscopy techniques are employed for structural characterization of edible films; however, most of these only provide qualitative information. The aim of this study was to characterize the surface microstructure of alginate, chi...

The effect of microstructural refinement and intercritical annealing on the mechanical properties and work-hardening response of a low carbon St12 steel was studied. It was revealed that intercritical annealing of the ferritic-pearlitic sheet results in the formation of a coarse-grained DP microstructure with discrete martensite islands normally formed in place of pearlitic colonies, which resu...

Consolidation and sintering of bismuth telluride nanoplatelets is a cost-effective method of manufacturing high thermoelectric figure-of-merit materials. A structural optimization method is employed here to study the effects of columnar structures formed by nanoplatelet composites on thermal transport. The initially sparse and random distribution of nanoplatelets is compacted into a jammed stat...

A series of Al-4Ti master alloys with various TiAl₃ particles were prepared via pouring the pure aluminum added with K₂TiF₆ or sponge titanium into three different molds made of graphite, copper, and sand. The microstructure and morphology of TiAl₃ particles were characterized and analyzed by scanning electron microscope (SEM) with energy dispersive spectroscopy (EDS). The microstructure of TiA...

The acoustical macro-behavior of mineral open-cell foam samples is modeled from microstructure morphology using a three-dimensional idealized periodic unit-cell (3D-PUC). The 3D-PUC is based on a regular arrangement of spheres allowed to interpenetrate during the foaming process. Identification and sizing of the 3D-PUC is made from x-ray computed microtomography and manufacturing process inform...

The subsystem Nurse’s A-phase-silicocarnotite within the system Ca3(PO4)2–Ca2SiO4 was conducted as a preliminary step toward obtaining new biomaterials with controlled microstructures. Phase composition of the resulting ceramics was studied by X-ray diffraction, differential thermal analysis, and scanning electron microscopy with attached wavelength dispersive spectroscopy. The results showed t...