利用真空非自耗电弧炉制备了不同Al含量的Nb-21Ti-4C (βNb-Ti)合金,研究了Al元素含量变化对Nb-21Ti-4C合金组织和晶格常数的影响.研究表明;铸态条件下合金由枝晶生长的Nb基固溶体(Nbss),碳化物((Nb,Ti)C),Nb3Al和枝晶间Nbss/MC共晶组织构成；Al元素部分固溶进入Nbss和MC中,随着Al含量增加,以Nb3Al相生长在Nbss内部.Al元素含量增加,使得Nbss枝晶先变大后变小.1100℃,24 h热处理后,Nbss内部析出针状或片状碳化物和Nb3Al,导致Nbss晶格常数增大;枝晶间碳化物内部Nbss进一步长大,Nb原子的析出和Al元素同溶含量变化导致碳化物晶格常数改变.
参考文献
| [1] | 张小明.日本Nb基超合金和复合材料研究新进展[J].稀有金属快报,2005(02):3-7. |
| [2] | 周瑞发;韩雅芳.高温结构材料[M].北京:国防工业出版社,2006:152. |
| [3] | Jiao H S;Jones I P;Aindow M .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2008,485(06):359. |
| [4] | Ding Rengen;Jones I P;Jiao Huisheng .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2007,485:126. |
| [5] | Jiao Huisheng;Jones I P;Aindow M .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2006,416(01):269. |
| [6] | 金永元.铌@高温应用[M].北京:冶金工业出版社,2005:84. |
| [7] | Allameh SM.;Hayes RW.;Loria EA.;Soboyejo WO. .Creep behavior in an extruded beta solid solution Nb-Ti base alloy[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2002(0):856-862. |
| [8] | Tan Y.;Ma CL.;Kasama A.;Tanaka R.;Mishima Y.;Hanada S.;Yang JM. .Effect of alloy composition on microstructure and high temperature properties of Nb-Zr-C ternary alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2003(1/2):282-288. |
| [9] | Keith J;Joseph C .[J].Materials Science and Engineering A:Structural Materials Properties Microstructure and Processing,2002,329-331:282. |
| [10] | Ebrahimi F;Ruiz-Aparicio J G L .[J].Journal of Alloys and Compounds,1996,245:1. |
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%