以Nb、Si和Ti粉末为原料,采用放电等离子烧结(SPS)技术对Nb-20Si、Nb-20Si-5Ti、Nb-20Si-15Ti和Nb-20Si-24Ti材料进行原位合成.利用扫描电镜(SEM)、电子探针微区分析(EPMA)和X射线衍射(XRD)等手段对材料的组织结构进行分析,探讨Ti对复合材料组织和性能的影响规律.结果表明,Ti元素的加入使得复合材料中Nb5Si3相转变成(Nb,Ti)5Si3,随着Ti加入量的增加,组织中出现了单质的Ti相,当Ti含量达到24%时,组织中还会出现Nb3Si相;同时Ti的加入会降低复合材料的硬度,提高其高温抗氧化性能.
参考文献
[1] | Yeh C L;Chen W H .[J].Journal of Alloys and Compounds,2006,425:216. |
[2] | Chen Z;Yan Y W .[J].Journal of Alloys and Compounds,2006,413:73. |
[3] | Geng J;Tsakiropoulos P;Shao G .[J].Intermetallics,2007,15(03):69. |
[4] | Kim W Y;Hisao T;Akio K .[J].Intermetallics,2001,9(06):521. |
[5] | Jie Geng;Panos Tsakiropoulos;Guosheng Shao .A study of the effects of Hf and Sn additions on the microstructure of Nb_(ss)/Nb_5Si_3 based in situ composites[J].Intermetallics,2007(26):69-76. |
[6] | Li Z;Peng LM .Microstructural and mechanical characterization of Nb-based in situ composites from Nb-Si-Ti ternary system[J].Acta materialia,2007(19):6573-6585. |
[7] | Qu Sh Y;Han Y F;Song L G .[J].Intermetallics,2007,15:810. |
[8] | Sha J;Hirai H;Tabaru T et al.[J].Metallurgical and Materials Transactions,2003,34A:2861. |
[9] | Chan KS. .Alloying effects on fracture mechanisms in Nb-based intermetallic in-situ composites[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(0):513-522. |
[10] | Chan K S;Davidson D L .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2003,34A:1833. |
[11] | Murakami T;Sasaki S;Ichikawa K et al.[J].Intermnetallics,2001,9:621. |
[12] | 陈哲,严有为.原位Nb/Nb5Si3复合材料的放电等离子烧结及结构形成机理[J].稀有金属材料与工程,2006(03):484-487. |
[13] | 龙文元,夏春,陈哲,严有为.SPS熔铸工艺制备Nb/Nb5Si3原位复合材料[J].稀有金属材料与工程,2010(08):1427-1430. |
[14] | Xiong Bowen;Long Wenyuan;Chen Zhe et al.[J].Journal of Alloys and Compounds,2009,471(1-2):404. |
[15] | 熊博文,龙文元,陈哲,万红,严有为.W和W-Mo对等离子烧结Nb/Nb5Si3复合材料显微组织的影响[J].稀有金属材料与工程,2009(06):1112-1115. |
[16] | Grammenos I;Tsakiropoulos P .[J].Intermetallics,2010,18:242. |
[17] | Vellios N;Tsakiropoulos P .[J].Intermetallics,2007,15:1518. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%