| 深过冷合金再辉与凝固组织的研究 |
| |
| 引用本文： | 李德林,杨根仓,周尧和.深过冷合金再辉与凝固组织的研究[J].金属学报,1992,28(10):1-5. |
| |
| 作者姓名： | 李德林 杨根仓 周尧和 |
| |
| 作者单位： | 西北工业大学403教研室，西北工业大学，西北工业大学 710072 |
| |
| 摘 要： | 发现深过冷Ni_(68)B_(21)Si_(11)合金液形核过程中的多次再辉现象,揭示了二次和三次再辉的过冷条件,以及对凝固组织的影响。研究结果表明,深过冷Ni_(68)B_(21)Si_(11)合金液存在两种凝固机制:一是NilB,Nj‘si,B和Ni,B的三相共晶生长;另一个是以NilB为领先相的枝晶簇生长。当过冷度低于200K或超过310K时,合金液凝固仅伴生一次再辉,其晶体生长以第一种凝固方式进行。其他过冷范围内的合金液则发生多次再辉和枝晶簇凝固。
|
| 关 键 词： | 再辉 深过冷 X射线分析 镍基合金 |
| 收稿时间： | 1992-10-18 |
| 修稿时间： | 1992-10-18 |
RECALESCENCE AND SOLIDIFICATION MICROSTRUCTURE OF HIGHLY UNDERCOOLED ALLOY Ni_(68)B_(21)Si_(11). |
| |
| LI Delin,YANG Gencang,ZHOU Yaohe.RECALESCENCE AND SOLIDIFICATION MICROSTRUCTURE OF HIGHLY UNDERCOOLED ALLOY Ni_(68)B_(21)Si_(11).[J].Acta Metallurgica Sinica,1992,28(10):1-5. |
| |
| Authors: | LI Delin YANG Gencang ZHOU Yaohe |
| |
| Affiliation: | LI Delin,YANG Gencang,ZHOU Yaohe (Northwestern Polytechnical University,Xi'an) |
| |
| Abstract: | One, two and three recalescence events in the solidification of highly undercooled Ni_(68)B_(21)Si_(11) alloy melt and the conditions of undercooled together with the effect on solidification morphologies were revealed. The solidification morphologies of the undercooled alloy may be examined in the light of two aspects, i.e., growth of either Ni_3B Ni_6Si_2B and Ni_2B eutectic or dendrite cluster with Ni_3B as leading phase. When the degree of undercooling below 200 or over 310 K, the solidification of alloy is accompannied by one recalescene only, and the crystals grow according to the first mode of solidification. While undercooling at other temperatures, two or three events of recalescence may occur and the dendrite cluster may solidify. |
| |
| Keywords: | recalescence event undercooling X-ray analysis Ni_(65)B_(21)Si_(11) |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《金属学报》浏览原始摘要信息 |
|
点击此处可从《金属学报》下载全文 |
|
