A simulation study of the transition properties of microstructures of liquid metal Al during heating and cooling processes has been performed by the molecular dynamics method. It is demonstrated that in the temperatur...A simulation study of the transition properties of microstructures of liquid metal Al during heating and cooling processes has been performed by the molecular dynamics method. It is demonstrated that in the temperature range of 1800-350K, the 1551, 1541, 1431, 1311, 1321 and 1422 bond types represented by the Honeycutt Andersen index play an important role. Especially, the 1551 bond type plays a leading role and is the decisive factor for the change of the second peak of the pair distribution function from a smooth sine peak into two split secondary peaks via a platform during all the processes of microstructure transitions. From the variation curve of the 1551 bond type, it can be clearly seen that there are five rapidly changing ranges corresponding qualitatively to the critical transition points of microstructures of the system detected experimentally.展开更多
There are many skarn deposits that occur in volcanic rocks as stratiform and lentoid bodies,for example the Lower Yangtze River Valley,Western Tianshan Mountains and Lhasa Terrane in China,the Nuuk in West Greeland an...There are many skarn deposits that occur in volcanic rocks as stratiform and lentoid bodies,for example the Lower Yangtze River Valley,Western Tianshan Mountains and Lhasa Terrane in China,the Nuuk in West Greeland and the Austroalpine Alps(e.g.Xv et al.,1984;Appel,1994;Raith and Stein,2000;Wang et al.,2001;Gu et al.,2007;Hou et al.,2011;Zhou et al.,2011;Jiang et al.,2012;Xu et al.,2010;Wang et al.,2012;Yu et al.,2011).展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.59871016。
文摘A simulation study of the transition properties of microstructures of liquid metal Al during heating and cooling processes has been performed by the molecular dynamics method. It is demonstrated that in the temperature range of 1800-350K, the 1551, 1541, 1431, 1311, 1321 and 1422 bond types represented by the Honeycutt Andersen index play an important role. Especially, the 1551 bond type plays a leading role and is the decisive factor for the change of the second peak of the pair distribution function from a smooth sine peak into two split secondary peaks via a platform during all the processes of microstructure transitions. From the variation curve of the 1551 bond type, it can be clearly seen that there are five rapidly changing ranges corresponding qualitatively to the critical transition points of microstructures of the system detected experimentally.
文摘There are many skarn deposits that occur in volcanic rocks as stratiform and lentoid bodies,for example the Lower Yangtze River Valley,Western Tianshan Mountains and Lhasa Terrane in China,the Nuuk in West Greeland and the Austroalpine Alps(e.g.Xv et al.,1984;Appel,1994;Raith and Stein,2000;Wang et al.,2001;Gu et al.,2007;Hou et al.,2011;Zhou et al.,2011;Jiang et al.,2012;Xu et al.,2010;Wang et al.,2012;Yu et al.,2011).
