The determination of foil thickness by scanning transmission electron microscopy

Kelly, P.M.; Jostsons, A.; Blake, Robert G.; Napier, J. G.

doi:10.1002/pssa.2210310251

Cited by 557 publications

(155 citation statements)

References 8 publications

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“…19) The number density of dislocations in a given area A on a negative micrograph was thus determined using eq. (2):…”

Section: Dislocation Analysismentioning

confidence: 99%

“…19) Figure 7 shows typical examples of CBED patterns recorded from (a) Al-10Mg and (b) Al-10Mg-0.5Ag (mass%) alloys in the as-quenched condition. The two beam condition was selected with the electron beam parallel to h110i and an operating vector g ¼ 220.…”

Section: Measurement Of Foil Thicknessmentioning

confidence: 99%

“…In addition, the foil thickness cannot be claimed to be accurate to better than AE2%. 19) However, even allowing for such errors, it is clear that the dislocation density in the ternary Ag-modified alloy is significantly lower than that in the binary alloy. This is consistent with the proposal that the addition of Ag will lead to a reduction in the as-quenched dislocation density.…”

Section: Determination Of Dislocation Densitymentioning

confidence: 99%

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Characterisation of Precipitation Hardening Response and As-Quenched Microstructures in Al-Mg(-Ag) Alloys

Kubota¹,

Nie²,

Muddle³

2004

Mater. Trans.

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The age-hardening response in Al-Mg alloys, with and without trace additions of Ag, aged isothermally at 160 C, 200 C and 240 C was investigated. Additionally, the effects on ageing response of cold work introduced after solution treatment, water quenching and prior to the ageing treatments were clarified for the Al-Mg-(Ag) alloy. The dislocation populations in the as-quenched microstructures of Al-10 mass% Mg alloys with and without trace additions of Ag were characterised. Trace additions (0.5 mass%) of Ag to Al-Mg alloys with low solute Mg contents (<5 mass%) promote an age-hardening response, while similar additions to Al-Mg alloys with higher solute Mg contents (e.g. 10 mass%) enhance significantly the age-hardening response. The age-hardening response in an Al-10Mg-0.5Ag (mass%) alloy is significantly enhanced by the introduction of 7% cold work, post solution treatment and prior to ageing at 160 C and 200 C. The identity of the dislocations in as-quenched Ag-free and Ag-modified Al-10 mass% Mg alloys has been confirmed as unit perfect a=2h110i type. The addition of Ag does not appear to modify the form of the dislocations and no dissociation of these dislocations was observed. The density of dislocations in the solution treated and quenched condition in the Al-10 mass% Mg alloy was higher by a factor of $2 compared to that in the Al-10Mg-0.5Ag (mass%) alloy subjected to similar treatment.

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“…19) The number density of dislocations in a given area A on a negative micrograph was thus determined using eq. (2):…”

Section: Dislocation Analysismentioning

confidence: 99%

Section: Measurement Of Foil Thicknessmentioning

confidence: 99%

Section: Determination Of Dislocation Densitymentioning

confidence: 99%

See 1 more Smart Citation

Characterisation of Precipitation Hardening Response and As-Quenched Microstructures in Al-Mg(-Ag) Alloys

Kubota¹,

Nie²,

Muddle³

2004

Mater. Trans.

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“…The number of cavities and their area and volume were obtained by counting and sizing them in cross-section images; these quantities were normalized to the fiont wafer area by measuring specimen thickness using diffiaction thickness fiinges [13] or convergent-beam diffiaction methods [18]. A size distribution with 2 nm increments was made using each cavity's largest observed diameter, since it is readily identified for all cavities.…”

Section: Cavity Evolution and Thermal Stabilitymentioning

confidence: 99%

Cavity formation and impurity gettering in He-implanted Si

Follstaedt

Myers

Petersen

et al. 1996

J. Electron. Mater.

119

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Cavity microstructures formed in Si after ion implantation of He and annealing at 700°C or above are examined with cross-section transmission electron microscopy. A threshold concentration of 1.6 at.% He is identified to form cavities that survive such anneals. The cavities coarsen with a constant volume of 15 nm3/nm2 (per wafer surface area), corresponding to -0.75 lattice sites per implanted He atom. The internal area of the cavities is 3-7 times that of the wafer surface area for fluences of lx1017 He/cm2.Transition metal atoms (Cu, Ni, Coy Fe, Au) are shown to be strongly trapped (1.5 -2.2 eV) on the cavity walls by chemisorption. Whereas Cu, Au and Ni are bound more strongly to the cavity sites than to their respective precipitated phases, Co and Fe are more strongly bound to their silicides; nonetheless, appreciable trapping of Co and Fe does occur in equilibrium with the silicides. Cavity trapping appears to be an effective gettering mechanism at low impurity levels, as needed to meet future microelectronics device requirements.

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“…The widest part of the extinction band changes from being close to the central beam in Fig. 4 Napier (1975). The crystal thickness for the pattern in Fig.…”

Section: Convergent-beam Diffractionmentioning

confidence: 87%

Electron optical study of rutile

Creek¹,

Spargo²

1985

J Appl Cryst

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Convergent-beam electron diffraction has been used to confirm the accepted space group of rutile (TiOz) and to study in detail the dependence of the intensity of the space-group-forbidden reflections on crystal thickness and orientation. The observations are shown to be in detailed agreement with computersimulated patterns calculated using the standard structural parameters. The diffraction results provide a basis for understanding the high-resolution electronmicroscope images of rutile crystals oriented close to the 1-001] zone in which the effects of the space-groupforbidden reflections are important. It is concluded that satisfactory agreement exists between experimental and calculated images provided that allowance is made for uncertainty in the orientation of the crystal.

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The determination of foil thickness by scanning transmission electron microscopy

Cited by 557 publications

References 8 publications

Characterisation of Precipitation Hardening Response and As-Quenched Microstructures in Al-Mg(-Ag) Alloys

Characterisation of Precipitation Hardening Response and As-Quenched Microstructures in Al-Mg(-Ag) Alloys

Cavity formation and impurity gettering in He-implanted Si

Electron optical study of rutile

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