纳米团簇强化型铁素体钢设计中空位组元的作用

上海金属, 2008, 30(4): 1-6. doi: 10.3969/j.issn.1001-7208.2008.04.001

纳米团簇强化型铁素体钢设计中空位组元的作用

^1, , ^2, , ^3, , ^4, , ^5,

1.美国橡树岭国家实验室材料科学与技术部,PO Box 2008,Oka Ridge,TN 37831-6136,USA

2.美国橡树岭国家实验室材料科学与技术部,PO Box 2008,Oka Ridge,TN 37831-6136,USA

3.雄谷州立大学物理系, Allendale, MI 49401,USA

4.美国橡树岭国家实验室材料科学与技术部,PO Box 2008,Oka Ridge,TN 37831-6136,USA

5.美国橡树岭国家实验室材料科学与技术部,PO Box 2008,Oka Ridge,TN 37831-6136,USA;田纳西大学材料科学与工程系,Knoxville, TN 37996,USA

关键词：纳米团簇 , 高温稳定性 , 原子探针 , 铁基合金 , 空位组元

VACANCIES AS A CONSTITUTIVE ELEMENT FOR THE DESIGN OF NANOCLUSTER-STRENGTHENED FERRITIC STEELS

高温下可稳定存在的纳米团簇由于具有科学研究意义及潜在应用价值,已引起了研究者的强烈兴趣.利用原子探针技术在温度接近1400℃(0.92Tm)的铁基合金中观察到了高稳定的纳米团簇,从而打破了人造纳米结构材料高温不稳定性约束.在一种空位作为关键合金组元,同时(Ti+Y)/O比与稳定的TiO2和Y2Ti2O7比率不同的高缺陷新材料中,观察到直径约4nm的富氧、钛和钇纳米团簇.在钛和钇存在的条件下,空位在提高氧溶解度和氧结合能方面具有不可替代的作用,因而导致共格纳米团簇的稳定性.原子探针成像特征和理论预测表明空位可首次被作为一种纳米级组分来设计具有优良高温性能的材料.

参考文献

[1]	Miller M.K.Atom Probe Tomography:Analysis at the Atomic Level[M].Kluwer Academic/Plenum Publishers,2000
[2]	Larson D.J;Maziasz P.J;Kim I.S;Miyahara K .[J].Scripta Materialia,2001,44:359.
[3]	Miller M.K;Kenik E.A;Russell K.F;Heatherly L,Hoelzer D.T Maziasz P.J .[J].Materials Science and Engineering,2003,A353:140.
[4]	Miller MK;Hoelzer DT;Kenik EA;Russell KF .Nanometer scale precipitation in ferritic MA/ODS alloy MA957[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2004(0):338-341.
[5]	Miller M.K;Hoelzer D.T;Kenik E.A;Russell K.F .[J].Intermetallics,2005,13:387.
[6]	Miller MK;Russell KF;Hoelzer DT .Characterization of precipitates in MA/ODS ferritic alloys[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2006(1/3):261-268.
[7]	Hoelzer DT;Bentley J;Sokolov MA;Miller MK;Odette GR;Alinger MJ .Influence of particle dispersions on the high-temperature strength of ferritic alloys[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2007(a):166-172.
[8]	Pareige P;Miller MK;Stoller RE;Hoelzer DT;Cadel E;Radiguet B .Stability of nanometer-sized oxide clusters in mechanically-alloyed steel under ion-induced displacement cascade damage conditions[J].Journal of Nuclear Materials: Materials Aspects of Fission and Fusion,2007(2):136-142.
[9]	Allen T.R;Gan J;Cole J.I;Miller M.K Busby J.T,Ukai S,Ohtsuka S,Shutthanandan S Thevuthasan S.[J].Journal of Nuclear Materials
[10]	Miller M.K;Smith G.D.W.Atom probe microanalysis:principles and applications to materials problems[M].Materials Research Society,Pittsburgh,PA,1989
[11]	Fu C.L;Krcmar M;Painter G.S;Chen X-Q .[J].Physical Review Letters,2007,99:225502.
[12]	Perdew J.P;Wang Y .[J].Physical Review,1991,B45:13244.
[13]	Vanderbilt D .[J].Physical Review,1990,B41:7892.
[14]	Kresse G;Furthmüller J .[J].Computational Materials Science,1996,6:15.

上一张下一张

计量

下载量()
访问量()

作者相关

在本站搜索
在百度学术搜索
在万方数据库搜索
在CNKI搜索

文章评分

您的评分：
1

0%
2

0%
3

0%
4

0%
5

0%

材料期刊网