Microtexture development during rapid cooling in three rhyolitic lava flows

2013 ◽  
Vol 98 (2-3) ◽  
pp. 304-318 ◽  
Author(s):  
S. J. Seaman
Keyword(s):  
Lava Flows ◽  
Rapid Cooling ◽  
Rhyolitic Lava

scholarly journals Eruption mechanisms and short duration of large rhyolitic lava flows of Yellowstone

2017 ◽  
Vol 458 ◽  
pp. 80-91 ◽  
Author(s):  
Matthew W. Loewen ◽  
Ilya N. Bindeman ◽  
Oleg E. Melnik
Keyword(s):  
Short Duration ◽  
Lava Flows ◽  
Rhyolitic Lava

The rhyolitic lava flows of the Lebombos (SE-Africa)

1973 ◽  
Vol 37 (4) ◽  
pp. 515-529 ◽  
Author(s):  
H. Wachendorf
Keyword(s):  
Lava Flows ◽  
Rhyolitic Lava

Domain coarsening by grain boundary migration in ordered Ni4Mo

1986 ◽  
Vol 44 ◽  
pp. 560-561
Author(s):  
K. Vasudevan ◽  
H. P. Kao ◽  
C. R. Brooks ◽  
E. E. Stansbury
Keyword(s):  
Grain Boundary ◽  
Grain Boundaries ◽  
Short Range ◽  
Boundary Migration ◽  
Grain Boundary Migration ◽  
Rapid Cooling ◽  
Temperature Range ◽  
Fee Structure ◽  
Domain Coarsening ◽  
Boundary Reaction

The Ni4Mo alloy has a short-range ordered fee structure (α) above 868°C, but transforms below this temperature to an ordered bet structure (β) by rearrangement of atoms on the fee lattice. The disordered α, retained by rapid cooling, can be ordered by appropriate aging below 868°C. Initially, very fine β domains in six different but crystallographically related variants form and grow in size on further aging. However, in the temperature range 600-775°C, a coarsening reaction begins at the former α grain boundaries and the alloy also coarsens by this mechanism. The purpose of this paper is to report on TEM observations showing the characteristics of this grain boundary reaction.

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