transcrystalline

transcrystalline

[¦tranz′krist·əl·ən]
(metallurgy)
Across the crystals of a metal; used of cracks in metals. Also known as intracrystalline; transgranular.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Among these fillers, carbon nanotubes (CNTs) have captured a great amount of attention due to their outstanding tensile modulus (270-950 GPa) [1], tensile strength (ll-63GPa) [1], thermal (200-3,000 W/m/K at 300 K) [2-4] and electrical conductivity ( [10.sup.2]-[10.sup.7] S/m at 300 K) [5], high aspect ratio [6], and role as viscosity modifier [7], CNTs also act as nucleating agent for polymer crystallization [8-14] and have the potential for templating polymer interphase including ordered graphitic structure [15-17], as well as nanohybrid shish kebab [18, 19] and transcrystalline structures [20-22].
As indicated by the circle in the fractography image in Figure 11(b), a cleavage-type transcrystalline fracture appeared in the interdendritic region.
Glagolev's method [18] was used to estimate the portions of areas with different fracture modes (ductile transcrystalline fracture, cleavage, quasi-cleavage, brittle intercrystalline fracture, and ductile intercrystalline fracture) in the total fracture surface after Charpy tests at different temperature.
Meanwhile, brittle transcrystalline fracture morphology represented by cleavage fractures and trans-crystalline cracks existed in the sandstone fracture at the lower hating rate (Figure 12(a)).
The results showed that transcrystalline structures formed in the inner layers of the WAIM PP/SAN blend parts at the SAN contents of 4, 6, and 8 wt%, but were absent at an SAN content of 2 wt%.
At 1,8 spot power the structure of the parent metal consists in big dendrites with different orientation, and in welded metal many cracks with transcrystalline propagation, length 200[micro]m and distance about 5-8[micro]m, figure 4b.
For the produced coatings brittle inter- and transcrystalline fracture are characteristic.
In the case of samples prepared by injection molding of PP/EPR blends, depth-profiling studies have revealed the formation of a skin consisting of several layers ("stratification"), whose composition is different compared to the bulk phase (8,9,28); a transcrystalline layer (~~10 [micro]m thick) followed by an elastomer region (~~20 [micro]m thick) were detected in the outer regions of these samples.
Contrary to this, transcrystalline cleavage cracks (Type 2) which formed during loading remained closed.
Thirdly, propagation of intercrystalline microcrack is practically impossible without dislocation emission from its tip (in contrast to transcrystalline microcrack which may propagate on cleavage plane without dislocation emission) that requires large expenditure of energy.