Grain coarsening

Micro-cracks in the anode Heavy carbon deposition on Ni surface reconstruction of Ni 

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Hoch glanipoUtur, f. high-liister polish. >gluhen, n. Metal.) grain coarsening an> neal. 

Gouy method, 32 4, 10 Graham s salt, 4 4, 5, 6, 7, 10-11, 39 glasslike, 4 41-50 tetrametaphosphates from, 4 20 trimetaphosphate from, 4 44-45 ultraphosphates from, 4 56 Grain coarsening, 31 14 Graphite... 

Equimolar concentrations of Li, Na, and K have about the same effect on grain coarsening, which supports this theory. Nevertheless, the presence of a volatile alkali-tungsten-oxygen compound has also been made responsible for grain coarsening [3.41]. 

Dynamic restoration for Ti-6A1-4V normally involves dynamic recovery (Fig. 7.13d). Once the tool passes the location, deformation and the attendant adiabatic heating cease, and cooling ensues locally. Static recovery and grain coarsening may occur on cooling above the 3-transus temperature (Fig. 7.13d). Upon further cooling. 

The Dow Coming and Carborundum fibers are comparable in terms of microstructure in the final product, except that the grain size of the Carbomndum material is three to ten times the size of the Dow Corning fiber. The resultant creep resistance scales as one would expect for divisional creep. The change in creep rate of the CVD-SiC has been quantitatively accounted for by the effects of grain coarsening on the diffusional creep rate (Lewinsohn et al., 1994). 

Shaw NJ, Brook RJ (1986) Structure and grain coarsening during the sinhaing of alumina. J Am Ceram Soc 69 107-110... 

Here, the change in interfacial energy (Ay) is due to densification and the change in interfacial area is due to grain coarsening. For solid state sintering, Ay is related to the replacement of solid/vapour interfaces (surface) by... 

Later, Svoboda and RiedeP studied more rigorously the pore shape, pore migration and grain coarsening for various types of pores. The predicted shape change of a flat pore was consistent with the experimental observation of Rodel and Glaeser. The velocity of an isolated pore was also derived to be similar to Eq. (11.17) except for a numerical constant which depends on the dihedral angle. 

Kang, S. S. and Yoon, D. N., Kinetics of grain coarsening during sintering of Co-Cu and Fe-Cu alloys with low liquid contents, MetalL Trans. A, 13A, 1405-11, 1982. 

Figure 12. SEM images of fracture surface after thermal cycling, for (1) 6 cycles, at (a) x500, (b) xl.5k (2) 10cycles, at (c) x500, (d) xl.5k. Comparison with the as-sintered microstructure at the same magnifications (Fig. 7 a, b> shows considerable grain coarsening with repeated thermal cycling.

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