The present work reports the design and fabrication of refractories with a bio inspired nacre-like microstructure comprising aligned alumina platelets, separated by an aluminium borate interphase, obtained through transient liquid phase sintering.
The results show that an ultrafine microstructure of essentially equiaxed grains, separated by high angle grain boundaries, is achieved only when a very intense plastic strain is imposed on the sample in each passage through the die as when using a die having a channel angle of Φ close to 90°.
Depending on the aging temperature, the final microstructure consists of large L12 domains separated by either thick platelets of the L10 structure, or by a saw-tooth like morphology.
In this work, the application of the Quenching and Partitioning (Q&P) process to two low-carbon steels has led to the development of a new kind of steel microstructure formed by laths of martensite separated by films of intercritical ferrite and retained austenite.
This paper discusses the feasibility of processing Ti TiBw dual matrix composites that could overcome these shortcomings, by generating composite microstructures consisting of TiBw Ti composite regions separated by a ductile Ti matrix.
To date it is not clear why stronger conservation of microstructure was found between species that are separated by 114-125 million years of independent evolution and whether this conservation can be extended to other loci in coffee and grapevine genomes.
Semicrystalline polymers exhibit different levels of microstructure: macromolecules, individual crystalline lamellae, stacks of lamellae separated by amorphous layers, spherulites.
The microstructure of HDPE consists of closely packed crystalline lamellae separated by layers of amorphous polymer.
FZ-processing led to the ordered microstructure creation consisting of volumetrically prevailing (γ+α2) lamellar colonies separated by minor seam-like γ-granular interlayers, and the least intergranular quota of β(Ti /B2 phase.
The results reveal an evolution in the microstructure with increasing strain from an array of elongated subgrains separated by boundaries having low angles of misorientation to an array of reasonably equiaxed grains separated by high-angle boundaries.
