Boudinage-type Structures at Sørfinnset, Gildeskaal, North Norway

1964 ◽  
Vol 101 (6) ◽  
pp. 488-495 ◽  
Author(s):  
R. Bradshaw ◽  
M. K. Wells
Keyword(s):  
Plastic Flow ◽  
High Temperatures ◽  
Lower Surface ◽  
Biotite Gneiss ◽  
North Norway

AbstractA layer of massive and lineated hornblende-biotite-gneiss has fractured along ac-joints (perpendicular to the layering and b–lineation), at regular intervals along its lower surface in contact with a thin marble bed. The joints have been opened from below and the marble has penetrated upwards to form intrusive tongues caused by extremely plastic flow folding, as shown by the unbroken banding in the marble. The structure constitutes a variety of one-sided boudinage involving segmentation in the lowest metre or so of the hornblendic rock, while the extreme marble deformation is all accommodated in a few centimetres thickness. The structures must have developed at relatively high temperatures to allow contemporaneous segregation of quartz-feldspar pegmatite veins from the hornblendic rock, and of diopside reaction skarns at the marble junctions.

Properties of Hard Rubber. XVIII. Action of Hydrocarbon Oils at High Temperatures (Part XV of Swelling of Rubber)

1947 ◽  
Vol 20 (1) ◽  
pp. 171-172
Author(s):  
J. R. Scott
Keyword(s):  
Petroleum Ether ◽  
Plastic Flow ◽  
High Temperatures ◽  
Critical Value ◽  
Transformer Oil ◽  
Aliphatic Hydrocarbons ◽  
Effect Of Temperature ◽  
Pronounced Change ◽  
Noticeable Effect ◽  
Two Samples

Abstract It has already been shown that liquids consisting essentially of aliphatic hydrocarbons, e.g., petroleum ether, paraffin, and transformer oil, had practically no swelling action at 34° C on two samples of hard rubber composed of rubber and sulfur only. Hard rubber shows a pronounced change in properties at temperatures above a critical value (“yield temperature”) in the neighborhood of 50° –80° C, the most noticeable effect being that it becomes much softer and more susceptible to plastic flow. It seemed likely, therefore, that the swelling action of liquids such as those mentioned above might be much greater at temperatures above this critical value. This view was strengthened by the statement of Dunton and Muir that hard rubber is “badly attacked” by immersion for 7 days in “hot” transormer oil. As no data appear to have been published on the effect of temperature on the swelling of hard rubber, experiments were made to examine this effect. Details of the hard rubber samples used are as follows.

Suppression of the Phase Transition and Agglomeration of TiSi2 by Addition of Zr Element

1998 ◽  
Vol 514 ◽  
Author(s):  
Sanghyun Yoon ◽  
Hyeongtag Jeon
Keyword(s):  
Phase Transition ◽  
High Temperatures ◽  
Lower Surface ◽  
Ex Situ ◽  
Vacuum Furnace ◽  
Ion Pump ◽  
Cross Sectional ◽  
Surface And Interface ◽  
Si Substrates

ABSTRACTThe formation of C49 TiSi2 phase at high temperatures was investigated by adding the Zr contents in Ti-silicide film. Stabilizing the C49 TiSi2 phase which exhibits lower surface and interface energies than those of the C54 TiSi2 phase at high temperatures was expected to suppress the problems of Tisilicide, such as the phase transition and the film agglomeration. The thin films of Ti and Zr were codeposited (40 nm) on Si substrates in the dual e-beam evaporation system equipped with an ion pump and its base pressure of ∼5 × 10−9 torr. The amounts of Zr contents (5 and 10 atomic %) added on Tisilicide were monitored by in-situ quartz crystal monitor. Immediately after the deposition, this film was annealed by ex-situ vacuum furnace at temperatures between 600 °C and 900 °C in 100 °C increments. The identification of the phase and the chemical composition were investigated by XRD and AES, respectively. The surface and interface morphologies were examined using cross-sectional TEM. The phase transition temperature of TiSi2 was raised with increasing Zr contents. The agglomeration of TiSi2 film was also suppressed by adding Zr element and much improved interface morphologies were observed.

Plastic flow in WC-13wt.%Co at high temperatures

1992 ◽  
Vol 156 (2) ◽  
pp. 125-130 ◽  
Author(s):  
T. Sakuma ◽  
H. Hondo
Keyword(s):  
Plastic Flow ◽  
High Temperatures

Mechanism of Plastic Flow in Titanium at Low and High Temperatures

JOM ◽  
1956 ◽  
Vol 8 (2) ◽  
pp. 115-122 ◽  
Author(s):  
F. D. Rosi ◽  
F. C. Perkins ◽  
L. L. Seigle
Keyword(s):  
Plastic Flow ◽  
High Temperatures

In situ REM imaging of surface processes on ceramic bulk crystals from 300 to 1670 K in a conventional TEM

1991 ◽  
Vol 49 ◽  
pp. 660-661
Author(s):  
Z. L. Wang ◽  
J. Bentley
Keyword(s):  
High Temperatures ◽  
Image Resolution ◽  
Atomic Processes ◽  
Crystal Surfaces ◽  
Beam Radiation ◽  
Surface Areas ◽  
Transmission Electron ◽  
Reflection Electron Microscopy ◽  
Gas Reactions

Studying the behavior of surfaces at high temperatures is of great importance for understanding the properties of ceramics and associated surface-gas reactions. Atomic processes occurring on bulk crystal surfaces at high temperatures can be recorded by reflection electron microscopy (REM) in a conventional transmission electron microscope (TEM) with relatively high resolution, because REM is especially sensitive to atomic-height steps.Improved REM image resolution with a FEG: Cleaved surfaces of a-alumina (012) exhibit atomic flatness with steps of height about 5 Å, determined by reference to a screw (or near screw) dislocation with a presumed Burgers vector of b = (1/3)<012> (see Fig. 1). Steps of heights less than about 0.8 Å can be clearly resolved only with a field emission gun (FEG) (Fig. 2). The small steps are formed by the surface oscillating between the closely packed O and Al stacking layers. The bands of dark contrast (Fig. 2b) are the result of beam radiation damage to surface areas initially terminated with O ions.

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