In this research, surface composite layers containing nano sized TiB2, Al2O3-TiB2, ZrO2 and CNT particles have been fabricated on Aluminum alloy substrates by friction stir processing. The effects of different processing variables such as number of passes and strengthening particle distribution, hardness, and wear properties of surface nano...

the prediction of porosity is achieved by using available core and log data; however, the estimationof permeability is limited to the scare core data. hence, porosity and saturation data through theframework of flow units can be used to make an estimation of reservoir permeability. the purposeof this study is to predict the permeability of a carbonate gas reservoir by using physical-basedempiri...

A basic alumina-spinel low cement castable (LCC) composed of sintered bauxite, reactive alumina, calcined alumina, calcined magnesia, microsilica, and high alumina refractory cement was prepared (castable A) to which 5% sodium hexa-meta phosphate was later added (castable B) to prepare samples for heat treatment at 110ºC, 900ºC, and 1400ºC. Bulk Density (BD), Apparent Porosity (AP), and Cold Cr...

Abstract Tropical cyclones range among the costliest of all meteorological events worldwide and planetary scale warming provides more energy moisture to these storms. Modelling national global economic repercussions 2017’s Hurricane Harvey, we find a qualitative change in response an increasingly warmer world. While United States were able balance regional production failures by original 2017 h...

The heterogeneity of horticultural substrates makes basic physical characteristics, such as total porosity and particle density, difficult to estimate. Due the material source, inclusion occluded pores, hydrophobicity, density values reported from using liquid pyknometry, vary widely. Gas pycnometry was used determine coir, peat, perlite, pine bark, wood substrates. Further precision examined b...

The development of a sub-surface layer of porosity during heat treatment has been studied in a variety of A1-Li alloys. Pure binary A1-Li alloys and three commercial materials were heat treated in air, vacuum and hydrogen for various lengths of time. Subsequent metallographic sectioning and polishing revealed the presence of a band of pores in the near-surface region extending approximately 300...