Cabot Corporation

About: Cabot Corporation is a company organization based out in Boston, Massachusetts, United States. It is known for research contribution in the topics: Carbon black & Carbon. The organization has 1279 authors who have published 1399 publications receiving 36736 citations.

Method and system for the fractionation of ethane-propane mixtures

Abstract: Relatively high pressure mixtures consisting essentially of a major ethane component and a minor, but substantial, propane component are separated into relatively pure ethane and propane fractions by subjecting such mixtures to a number of specific cooling steps and an expansion step preparatory to and in combination with a fractional distillation step. The overhead ethane fraction of the method has a propane content of no greater than about 10 mole percent and is provided in the gas phase. The propane bottom fraction of the method is provided in the liquid phase.

Stream splitter for spreading particulate material

Abstract: Stream Splitter For Spreading Particulate Material An inlet stream of particulate material is successively split into smaller stream segments. The segments are spread across a conveyor belt in a magnetic or conductivity separator. Inlet and inter-mediate stages of the splitter include troughs of triangular cross section to concentrate the streams before splitting them. The flow direction is re-versed in each stage to facilitate the axial con-centration of the material stream.

Surface wave studies of hydrogen damage incubation time

Abstract: Surface damage during galvanostatic H charging has been followed by monitoringin situ the change in attenuation of ultrasonic Rayleigh surface waves on charged Fe- and Ni-base fcc stainless alloys. Attenuation initially decreases as H atoms enter the surface and pin dislocations. It then passes through a minimum as significant surface damage begins to occur. The time to reach the minimum is a good estimate of damage incubation timetc. The incubation time decreases as charging current density increases, but it is fairly insensitive to alloy composition and thermomechanical state. In contrast, the nature of the surface damage, ranging from intergranular cracking, to fissuring, to blistering, is a strong function of composition and treatment. Studies of the change in imposed cathodic potential with time at a given galvanostatic charging condition indicate that the potential also passes through a minimum attc, but that this minimum is broad and not as sensitive a gage of failure as attenuation change. The increase in potential as the minimum is passed is associated with the exposure of failed anodic regions to the electrolyte.

Correlating microstructure and texture in cold-rolled Ta ingot

Abstract: An analysis of tantalum ingot cold-rolled and annealed under different conditions reveals several correlations between the microstructure, developed textures and thermomechanical processing parameters. For example, the hardness of rolled sheet is not significantly affected by the amount of reduction prior to the final anneal, while the final grain size decreases with an increasing number of intermediate annealing steps. Four classes of texture are found in the cold-rolled tantalum, but the finer-grained classes can only be produced via a 70 percent reduction in thickness prior to the final anneal. Although ample dislocation debris is produced by the rolling operation, clearly defined line dislocations and dislocation networks are absent, indicating that full recrystallization is not achieved in the finished sheets. A large concentration of ledge dislocations at the grain boundary regions is considered an important contributor to the good formability of tantalum.