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Ô²ÐεڶþÏàÁ£×Ó spherical second-phase particles
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СÀ¼»¨(½ð±Ò+1):charleygan£¬¶àл¹Ø×¢£¡ лл£¡ºÇºÇ~ 2010-06-11 21:01:40
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wypward(½ð±Ò+1):ÄǹÄÀøÏ塃 2010-06-11 16:33:46
СÀ¼»¨(½ð±Ò+8, ·­ÒëEPI+1):duxinghao£¬Äú·­ÒëµÃºÜ°ô£¡ ¶àлÄã°ï棡Óлú»áÔÙÏòÄúÇë½Ì£¡ 2010-06-11 20:59:17
Because the driving force of microstructural evolution for single-phase systems stems from the decrease of interfacial energy, so the second-phase particles will locate on the grain boundaries. The sites of second-phase precipitates on the grain boundaries can be determined by the fact that the steadiest system has the lowest systemic energy. Thus, that the spherical particles occupy usually the cross sites of triple grains and the stick particles arrange along with the grain boundaries is preferential, because this will result in the lowest systemic energy by providing least grain boundaries area.   

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5Â¥2010-06-11 16:08:32
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duxinghao

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СÀ¼»¨(½ð±Ò+1):лл°ï棡 2010-06-13 20:44:28
¡£¡£¡£by providing the least grain boundary area.
6Â¥2010-06-11 16:36:54
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434455167

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СÀ¼»¨(½ð±Ò+1):ллÄãµÄ¹Ø×¢ºÍ°ï棡 ½ð±ÒÉÙÁ˵㣬±ð½éÒ⣡ ллÄú£¡ 2010-06-11 21:02:35
sirljz(½ð±Ò+1): 2010-06-12 10:33:58
This is because the single-phase evolution of polycrystalline system, the driving force of grain from the system interface can be reduced, and the second phase particles at grain boundaries can reduce the interface, so when the circular second phase particles occupy the intersection of the three crystals, rod-like second-phase particles in the direction of the grain boundary and grain boundary in the same direction, the system reduces the size of the largest grain boundaries, the system interface to the minimum, consistent with trends in the evolution of the system.
7Â¥2010-06-11 16:48:45
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noleg

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sirljz(½ð±Ò+3):²»´í 2010-06-12 10:33:48
СÀ¼»¨(½ð±Ò+2):noleg ,ллÄãµÄÈÈÐİïæ£¡ лл 2010-06-13 20:44:02
zehuac(½ð±Ò+1):лл²ÎÓë¹þ£¬Ï£ÍûÒÔºó¸ü¼Ó»ý¼«µÄÓ¦Öú 2010-06-16 13:05:32
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Due to the reduction of the interfacial energy, from which the driving force of the grain evolution in monophase multicrystal system is originated, and the particle from the second phase locating on the boundary surface enable the lowering of interfacial energy, the area of the grain boundary and the interfacial energy reduce to a minimumvalue when the round/sperical second-phase particle occupy the trimorphous intersection, whereas the bar-shaped/stick second-phase particle locate on the boundary surface with their orientation parallel to the boundary. It is in accordance with the tendency for the system to evolve.

[ Last edited by noleg on 2010-6-11 at 21:37 ]
8Â¥2010-06-11 21:31:36
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