Lightweight Layered Materials/Structures for Damage Tolerant Armor

High Resolution Electron Microscopy of internal interfaces in layered materials

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100174734 ◽

1990 ◽

Vol 48 (4) ◽

pp. 320-321

Author(s):

Yoichi Ishida ◽

Hideki Ichinose ◽

Yutaka Takahashi ◽

Jin-yeh Wang

Keyword(s):

Grain Boundaries ◽

Mirror Symmetry ◽

Functional Materials ◽

High Resolution Electron Microscopy ◽

Layered Materials ◽

Plane Boundary ◽

Chemical Information ◽

Layer Plane ◽

High Tc ◽

Cubic Metals

Layered materials draw attention in recent years in response to the world-wide drive to discover new functional materials. High-Tc superconducting oxide is one example. Internal interfaces in such layered materials differ significantly from those of cubic metals. They are often parallel to the layer of the neighboring crystals in sintered samples(layer plane boundary), while periodically ordered interfaces with the two neighboring crystals in mirror symmetry to each other are relatively rare. Consequently, the atomistic features of the interface differ significantly from those of cubic metals. In this paper grain boundaries in sintered high-Tc superconducting oxides, joined interfaces between engineering ceramics with metals, and polytype interfaces in vapor-deposited bicrystal are examined to collect atomic information of the interfaces in layered materials. The analysis proved that they are not neccessarily more complicated than that of simple grain boundaries in cubic metals. The interfaces are majorly layer plane type which is parallel to the compound layer. Secondly, chemical information is often available, which helps the interpretation of the interface atomic structure.

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Damage tolerant design using collapse techniques

10.2514/6.1982-718 ◽

1982 ◽

Cited By ~ 3

Author(s):

R. HAFTKA

Keyword(s):

Damage Tolerant

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Damage tolerant structural design using neural networks

10.2514/6.1992-1097 ◽

1992 ◽

Cited By ~ 4

Author(s):

R. SWIFT ◽

S. BATILL

Keyword(s):

Neural Networks ◽

Structural Design ◽

Damage Tolerant

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Design diagrams for reliable layered materials

10.2514/6.1996-1476 ◽

1996 ◽

Cited By ~ 1

Author(s):

S. Spearing

Keyword(s):

Layered Materials

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An equivalent level of safety approach to damage tolerant aircraft structural design

10.2514/6.2000-1371 ◽

2000 ◽

Cited By ~ 6

Author(s):

K. Lin ◽

David Rusk ◽

Jiaji Du

Keyword(s):

Structural Design ◽

Damage Tolerant

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Dependence between calculated flexibility of lamellas of layered materials and their ability to undergo intercalation reactions

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19912859 ◽

1991 ◽

Vol 56 (12) ◽

pp. 2859-2868 ◽

Cited By ~ 4

Author(s):

Jiří Votinský ◽

Ludvík Beneš

Keyword(s):

Computational Procedure ◽

Layered Materials ◽

Space Group

A computational procedure has been suggested enabling estimates of the flexibility of individual layered materials from their crystallographical structure. The data about flexibility of layers have been obtained by calculation for compounds of the type Q2Y3 (Q = SbIII, BiIII; Y = Se-II, Te-II; space group of symmetry R3m), MPS3 (M = MnII, FeII, CoII, NiII, CdII,C2/m), TX2 (T = NbIV, TaIV, MoV; X = S-II, Se-II; P63/mmc), FeOCl (Pmnm), Zr(HPO4)2 (P21/n) and ROPO4 (R = VV, NbV, Mo; P4/n). The flexibility of the layers of these compounds increases in the order: Q2Y3 << MPS3 < TX2 < FeOCl = Zr(HPO4)2 < ROPO4. The same trend is observed for the ability of these compounds to form intercalates. In most of the structures given a distinct anisotropy of flexibility has been found by the calculation.

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