نتایج جستجو برای: thermal cracking furnace

تعداد نتایج: 236090  

2002
Wei Jiang

Direct metal SLS processes use a high power laser beam to selectively fuse fully metallic powder to directly produce functional metal components or tooling. As a thermal dynamic process, it inevitably causes thermal stresses, stress-induced deformations and cracking. Understanding these is very important in controlling residual stresses and stress-induced deformations. In this research, the res...

2000
Laurent Louis Warnet

Two themes form the basis of this study on fibre reinforced laminated composites: namely 'thermal residual stress' and 'transverse cracking'. Thermal residual stresses are inherent to any composite structure and are internal stress within the structure that form during manufacture. Their formation arises from the difference in coefficient of thermal expansion of the fibre and the matrix. These ...

2006
VASANT R CHOUDHARY KARTICK C MONDAL SHAFEEK A R MULLA

Influence of the presence of CO2, which is a mild oxidant, on the performance of the thermal cracking of ethane to ethylene in the absence or presence of limited O2 at different temperatures (750– 900°C), space velocities (1500–9000 h) and CO2/C2H6 and O2/C2H6 mole ratios (0–2⋅0 and 0–0⋅3 respectively) has been investigated. In both the presence and absence of limited O2, ethane conversion incr...

2006
a. c. ferrari c. ducati j. robertson

We review our recent results on the growth and characterization of silicon nanowires (SiNWs). Vapourphase deposition techniques are considered, including chemical vapour deposition (CVD), plasma-enhanced chemical vapour deposition (PECVD), high-temperature annealing, and thermal evaporation. We present complementary approaches to SiNW production. We investigate the low-temperature (down to 300 ...

2005

The damage and fracture of materials are technologically of enormous interest due to their economic and human cost. They cover a wide range of phenomena like e.g. cracking of glass, aging of concrete, the failure of fiber networks in the formation of paper and the breaking of a metal bar subject to an external load. Failure of composite systems is of utmost importance in naval, aeronautics and ...

2008
S. Krämer

Mechanisms of cracking and delamination within thick thermal barrier systems in aero-engines subject to calcium-magnesium-alumino-silicate (CMAS) penetration S. Krämer a,∗, S. Faulhaber a, M. Chambers a, D.R. Clarke a, C.G. Levi a, J.W. Hutchinson b, A.G. Evans a a Materials Department, University of California, Santa Barbara, CA 93106-5050, United States b Division of Engineering and Applied S...

2005
Hideaki Takahashi Kimio Watanabe Toshiyuki Hashida

A concept of "Fractal Fracture Mechanics" for HDR .(Hot Dry Rock) geothermal reservoir design has been developed as an extension of conventional rock fracture mechanics. It is suggested that this concept is successfully applicable to characterize and model subsurface fracture network in HDR geothermal reservoir. Furthermore, this modeling procedure makes it possible to evaluate the thermal ener...

2003
I. Mc Dougall C.F.R. Smith B. Olmstead W. A. Gericke

A finite element model was generated of a Søderberg electrode in a ferromanganese smelter. In this model, the casing and fins were modelled explicitly, and temperature-dependent material properties were included. A two-stage analysis procedure was used, the first part being a coupled thermal-electrical analysis using an applied DC current. As the casing material was non–magnetic, the DC current...

2007
M.W.M. van Goethem J. Grievink J. A. Moulijn P.J.T. Verheijen

To develop new reactor options for thermal cracking of ethane or other light hydrocarbons to lower olefins a fundamental process synthesis approach is taken. Firstly, an optimal reaction path and conditions are targeted, starting from a mechanistic reaction network. Secondly, to implement the optimal reaction path the reactor geometry and equipment are designed. This contribution focuses on the...

2006
JIHUA CHEN CHEE KEONG TEE JUNYAN YANG CHARLES SHAW MAX SHTEIN JOHN ANTHONY DAVID C. MARTIN

Bis(triisopropylsilylethnyl) pentacene (TIPS pentacene) was synthesized to increase its solubility in common liquid solvents and, at the same time, enhance the p–p stacking between neighboring acenes in the crystallized state in comparison with unmodified pentacene. Hot-stage microscopy experiments revealed that during heating voids develop along the long axis of the TIPS pentacene films {along...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید