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【请教】非均质形核
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| heollo，最近看了两篇文献：其中提到了Ti2O3能成为晶内铁素体的形核，还有就是CaS能成为TiN的形核。我想问的是一种夹杂物成为一种夹杂物的异质形核核心，它本身有何特定的属性要满足才能才为另一种夹杂物的形核核心呢？希望各位出言相告。 |
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caocao4735
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2楼2009-05-07 20:47:37
hui_jun_li
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ziice(金币+2,VIP+0):感谢您的交流 5-7 21:57
caocao4735(金币+1,VIP+0):还有一篇呢最好把文章的PDF发出来 5-7 22:04
ziice(金币+2,VIP+0):感谢您的交流 5-7 21:57
caocao4735(金币+1,VIP+0):还有一篇呢最好把文章的PDF发出来 5-7 22:04
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关于晶内铁素体的形核， 这篇文章不错： Ferrite nucleation potency of non-metallic inclusions in medium carbon steels Acta Materialia, Volume 49, Issue 12, Pages 2115-2122 Abstract In recent years, there has been renewed interest in the role of non-metallic inclusions in controlling the microstructure of steels. The potency of various inclusions and precipitates such as SiO2, MnO·SiO2, MnS, Al2O3, Ti2O3 and VN for the nucleation of intragranular ferrite has been examined in the present study. Among them, single SiO2, MnO·SiO2, Al2O3, TiN and MnS particles seem to be inert to the nucleation of intragranular ferrite under the present experimental condition. Ti2O3 particles in a Mn-containing steel are very effective for the nucleation of intragranular ferrite, being (Ti,Mn)2O3 particles by absorbing Mn atoms from a steel matrix. On the other hand, Ti2O3 particles in a Mn-free steel are not effective. MnS and Al2O3 particles in high nitrogen steels containing vanadium also appear to be potent for the nucleation of intragranular ferrite. The decrease in transformation temperature causes a change in the morphology of intragranular ferrite from idiomorphic ferrite to acicular ferrite. |
3楼2009-05-07 21:54:10
hui_jun_li
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4楼2009-05-07 22:15:16
5楼2009-05-08 10:11:18