نتایج جستجو برای: sic sand packs

تعداد نتایج: 43892  

Journal: :CoRR 1999
Bill Devlin Jim Gray Bill Laing George Spix

Defines a vocabulary for scaleable systems: Geoplexes, Farms, Clones, RACS, RAPS, clones, partitions, and packs and dicusses the design tradeoffs of using clones, partitons, and packs.

2013
J H Choi L Latu-Romain E Bano Anne Henry W J Lee J. H. Choi E. Bano W. J. Lee

Different polytypes (α-SiC and β-SiC) and crystallographic orientations ((0001) and (11-20) of 6H-SiC) have been used in order to elaborate Silicon Carbide (SiC) nanopillars using inductively coupled plasma etching method. The cross section of the SiC pillars shows a rhombus, pentagon, or hexagonal morphology depending on polytypes and crystallographic orientations. The favored morphologies of ...

2011
B. P. Burton Steve Demers A. van de Walle

The cluster-expansion method was used to perform first principles phase diagram calculations for the wurtzite-structure quasibinary systems (SiC)1 X(AlN)X, (SiC)1 X (GaN)X and (SiC)1 X(InN)X; and to model variations of band gaps as functions of bulk compositions and temperature. In SiC-AlN, plane wave pseudopotential formation-energy calculations predict low-energy metastable states with format...

ژورنال: :مهندسی متالورژی 0
عاطفه نوحی دانشجوی کارشناسی ارشد دانشکده تحصیلات تکمیلی دانشگاه آزاد اسلامی واحد تهران جنوب فرشاد اخلاقی استاد دانشکده مهندسی متالورژی و مواد دانشگاه تهران

در این پژوهش از روش انباشت لایه های پودری برای ساخت کامپوزیت های تابعی al-sic استفاده شده است. به این منظور از پودر al خالص تجارتی با اندازه متوسط 120 میکرومتر به عنوان زمینه و از ذرات کاربید سیلیسیم در سه اندازه 50، 125 و 165 میکرومتر به عنوان فاز تقویت کننده استفاده شد. ابتدا درصد معینی از پودر sic با اندازه ذرات معین با پودر آلومینیم مخلوط شد تا توزیع یکنواختی در پودر al از روش مخلوط سازی تر...

2000
W. Kowbel C. A. Bruce K. L. Tsou K. Patel J. C. Withers G. E. Youngblood

SiC-SiC composites offer excellent potential for fusion energy as well as numerous commercial applications. High manufacturing cost and very low through-the-thickness (transverse) thermal conductivity (below 15 W/mK) hinders wider applications of SiC/SiC composites. To overcome these obstacles, a low-cost, Chemical Vapor Reaction (CVR) process was developed to fabricate crystalline, high purity...

Journal: :Energies 2023

There are many technologies to implement sand control in sand-prone wells, drilled either weakly or nonconsolidated sandstones. Technologies that used prevent sanding can be divided into the following groups: screens (wire-wrapped screens, slotted liners, premium and mesh screens), gravel packs, chemical consolidation, technological ways (oriented perforation bottomhole pressure limitation) of ...

2017
Craig R. Jackson Rosemary J. Groom Neil R. Jordan J. Weldon McNutt

BACKGROUND Spacing patterns mediate competitive interactions between conspecifics, ultimately increasing fitness. The degree of territorial overlap between neighbouring African wild dog (Lycaon pictus) packs varies greatly, yet the role of factors potentially affecting the degree of overlap, such as relatedness and pack size, remain unclear. We used movement data from 21 wild dog packs to calcu...

2015
Katia Bruxvoort Charles Festo Matthew Cairns Admirabilis Kalolella Frank Mayaya S. Patrick Kachur David Schellenberg Catherine Goodman Henk D. F. H. Schallig

BACKGROUND Self-report is the most common and feasible method for assessing patient adherence to medication, but can be prone to recall bias and social desirability bias. Most studies assessing adherence to artemisinin-based combination therapies (ACTs) have relied on self-report. In this study, we use a novel customised electronic monitoring device--termed smart blister packs--to examine the v...

2013
Janne Scheffels Ingeborg Lund

OBJECTIVES This study examined the perceptions of cigarette packaging and the potential impact of plain packaging regulations. The hypothesis was that the branded cigarette packages would be rated more positively than the corresponding plain packs with and without descriptors. DESIGN Between-subjects experimental online survey. Male and female participants were separately randomised to one of...

2016
Longbiao Li

In this paper, the comparison of cyclic hysteresis behavior between cross-ply C/SiC and SiC/SiC ceramic-matrix composites (CMCs) has been investigated. The interface slip between fibers and the matrix existed in the matrix cracking mode 3 and mode 5, in which matrix cracking and interface debonding occurred in the 0° plies are considered as the major reason for hysteresis loops of cross-ply CMC...

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