Displacive radiation-induced structural contraction in nanocrystalline ZrN

被引：23

作者：

Lu, Fengyuan ^{[1
]}

Huang, Mengbing ^{[2
]}

Yaqoob, Faisal ^{[2
]}

Lang, Maik ^{[3
,4
]}

Namavar, Fereydoon ^{[5
]}

Trautmann, Christina ^{[6
,7
]}

Sun, Hongtao ^{[1
]}

Ewing, Rodney C. ^{[3
,4
]}

Lian, Jie ^{[1
]}

机构：

[1] Rensselaer Polytech Inst, Dept Mech Aerosp & Nucl Engn, Troy, NY 12180 USA

[2] SUNY Albany, Ion Beam Lab, Albany, NY 12222 USA

[3] Univ Michigan, Dept Earth & Environm Sci, Ann Arbor, MI 48109 USA

[4] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[5] Univ Nebraska, Med Ctr, Dept Orthopaed Surg & Rehabil, Omaha, NE 68198 USA

[6] GSI Helmholtz Ctr Heavy Ion Res, D-64291 Darmstadt, Germany

[7] Tech Univ Darmstadt, D-64289 Darmstadt, Germany

来源：

APPLIED PHYSICS LETTERS | 2012年 / 101卷 / 04期

关键词：

ANOMALOUS LATTICE EXPANSION; INERT MATRIX; NANOSTRUCTURED MATERIALS; PROTON IRRADIATION; ION IRRADIATION; SIZE; PARTICLES; FUELS; TIN; STABILITY;

D O I：

10.1063/1.4738772

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Nanocrystalline ZrN thin films with 5 nm grain size, prepared by ion beam assisted deposition, maintained their isometric structure upon intensive displacive and ionizing irradiations, indicating an extremely high stability similar to bulk ZrN. However, a unique structural contraction up to 1.42% in lattice parameter occurred only in nano-sized ZrN upon displacive irradiations. A significant nitrogen loss occurred with reduced N:Zr atomic ratio to 0.88, probably due to the production of displaced nitrogen atoms and fast diffusion along grain boundaries in nanocrystalline ZrN matrix. The accumulation of nitrogen vacancies and related strain relaxation may be responsible for the structural contraction. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4738772]

引用

页数：4

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