Effect of trace Ce and B additions on the microstructure of Nb-3Si-22Ti
alloys |
| |
| Authors: | Meiling Wu Liwu Jiang Shiyu Qu Fengwei Guo Ming Li Yongwang Kang and Yafang Han |
| |
| Affiliation: | Science & Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095,
China,National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 100083, China,Science & Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095,
China,Science & Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095,
China,Science & Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095,
China,Science & Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095,
China and Science & Technology on Advanced High Temperature Structural Materials Laboratory, AECC Beijing Institute of Aeronautical Materials, Beijing 100095,
China |
| |
| Abstract: | The effects of trace Ce and B additions on the microstructure Nb-22Ti-3Si alloys were studied. The
microstructure of the alloys was observed by scanning electron microscope (SEM), and their phase
compositions were analyzed with X-ray diffraction (XRD) and Electro-Probe micro-analyzer (EPMA). The
distributions of the elements were detected by Spectrum analyzer. The interface of the phases in the alloys was
investigated by transmission electron microscopy (TEM). The results indicated that two phases of Nbss and
Nb3Si presented in Nb-22Ti-3Si, Nb-22Ti-3Si-0.2Ce and Nb-22Ti-3Si-0.2B alloys. The segregation of Ti at the
interface between Nbss and Nb3Si was promoted and the volume fraction of silicides in the alloy increased with
the trace B and Ce addition to the Nb-22Ti-3Si alloy respectively. And there was no single and definite
orientation relationship between Nb3Si and Nbss in Nb-22Ti-3Si, Nb-22Ti-3Si-0.2Ce and Nb-22Ti-3Si-0.2B
alloys. Compared with the Nb-22Ti-3Si alloy, the Nbss superlattice structure was found in Nb-22Ti-3Si-0.2Ce
and Nb-22Ti-3Si-0.2B alloys. |
| |
| Keywords: | Nb-3Si-22Ti alloy
Nb3Si
Ce
B
Microstructure
Phase interface
Superlattice |
| 本文献已被 CNKI ScienceDirect 等数据库收录！ |
| 点击此处可从《自然科学进展(英文版)》浏览原始摘要信息 |
|
点击此处可从《自然科学进展(英文版)》下载全文 |
|
