30 Result(s)

Article

The defect evolution in 1-D shocked tantalum single crystals

Tantalum single crystals were impacted along [001], [011] and [111] using 1-D planar shock waves with pressures of 6.4 GPa, 15.4 GPa and 21.7 GPa. The defect structures generated have been characterised using ...

B. Pang, I. P. Jones, J. C. F. Millett, G. Whiteman… in Journal of Materials Science (2021)

Article

Three-dimensional analysis of dendrites via automated serial sectioning using a Robo-Met.3D

The dendrite morphologies of the cast nickel-based superalloy CMSX-4^® (CMSX-4^® is registered trademarks of the Cannon-Muskegon Corporation) and the austenitic stainless steel HP microalloy have been obtained via ...

Y. Lu, M. Wang, Z. Wu, I. P. Jones, M. Wickins, N. R. Green… in MRS Communications (2020)

Article

The Effects of Prior Cold Work on the Shock Response of Copper

A series of experiments have been performed to probe the effects of dislocation density on the shock response of copper. The shear strength immediately behind the shock front has been measured using embedded m...

J. C. F. Millett, D. L. Higgins, D. J. Chapman… in Journal of Dynamic Behavior of Materials (2018)

Article

Anatomical explanations for the changes in properties of western red cedar (Thuja plicata) wood during heat treatment

Thermal treatment is an alternative to the chemical treatment in wood preservation, which has been used to some extent in improving timber quality. Despite the enormous works done so far on the effects of heat...

L. Awoyemi, I. P. Jones in Wood Science and Technology (2011)

Article

The Effects of a New Grain Boundary Phase in Ni-Al Alloy

In a ψ/ψ’ nickel-aluminum alloy, a new phase has been identified along grain boundaries by conventional transmission electron microscopy. This phase is identified to be of the C₆Cr₂₃ type structure with lattice p...

Y. L. Chiu, A. H. W. Ngan, I. P. Jones in MRS Online Proceedings Library (2011)

Article

Nanoscale defects and microwave properties of (BaSr)TiO₃ ferroelectric thin films

Thin film ferroelectrics may have important applications in microwave devices but in general have significantly worse properties than bulk material. This is principally because of secondary and point defects. ...

T. J. Jackson, I. P. Jones in Journal of Materials Science (2009)

Article

Microwave Phase Shifters: Epitaxial Growth by Pulsed Laser Deposition of Dielectric Ba_0.5Sr_0.5TiO₃ Thin Films on MgO

Ba_0.5Sr_0.5TiO₃ (BSTO) thin films were grown on (001) MgO using pulsed-laser deposition (PLD). The microstructures of in-situ and ex-situ annealed BSTO films were studied by X-ray diffraction and transmission elec...

Y. Y. Tse, P. M. Suherman, T. J. Jackson, I. P. Jones in MRS Online Proceedings Library (2006)

Article

Effect of carbon on microstructure and mechanical properties of a eutectoid β titanium alloy

The influence of carbon addition on the aging response of quenched Ti-13wt. % Cr has been investigated using hardness tests, tensile tests, optical microscopy, scanning electron microscopy, and transmission el...

M. Chu, I. P. Jones, **nhua Wu in Journal of Materials Engineering and Performance (2005)

Article

Suzuki Segregation to Stacking Faults in a Cu-Si alloy

Field Emission Gun Transmission Electron Microscopy (FEG TEM) is used to measure solute atom segregation to stacking faults in a Cu- 7.15 at% Si alloy annealed at temperatures of 275^oC, 400^oC and 550^oC. A highly ...

B.G. Mendis, I.P. Jones, R.E. Smallman in MRS Online Proceedings Library (2004)

Article

TEM characterisation of fatigue tested lamellar Ti-44Al-8Nb-1B

Detailed microstructural examination by TEM of fine-grained polycrystalline lamellar Ti-44Al-8Nb-1B after fatigue testing (R=0.1) at room temperature has been carried out. The operative slip systems were ident...

H. Jiang, D. Hu, I. P. Jones in MRS Online Proceedings Library (2004)

Article

The Oxidation of NdFeB Magnets

The oxidation kinetics in air of a commercial NdFeB magnet have been investigated over the temperature range 335–500°C. The oxide microstructure has been characterized by SEM, XRD and cross-sectional TEM. The ...

Y. Li, H.E. Evans, I.R. Harris, I.P. Jones in Oxidation of Metals (2003)

Article

Oxygen-stabilised partial amorphisation in a Zr₅₀Cu₅₀ alloy

Structural transitions on heating a ZrCu martensite prepared by induction melting and subsequent rapid cooling have been investigated by means of differential scanning calorimetry (DSC), electrical resistivity...

Z. Y. Liu, M. Aindow, J. A. Hriljac, I. P. Jones… in Journal of Materials Science (2002)

Article

Microstructural characteristics of the eutectoid mixture Zr2Cu and Zr7Cu10

Z. Y. Liu, M. Aindow, J. A. Hriljac, I. P. Jones… in Journal of Materials Science Letters (2001)

Article

Incommensurate Structure in Al-rich TiAl Alloys

The microstructures of Ti-Al alloys in the range 56–62 at.% Al have been studied. These compounds consist of a basic L1₀ structure on which is superimposed an irrational modulation (Ti₃Al₅ related). This is incom...

S. Wang, D. Fort, I. P. Jones, J. S. Abell in MRS Online Proceedings Library (2000)

Article

Creep in Single Crystal Ni₃AI

Single crystals of Ni₃AI (1 at%Ta) with a compression axis of [123] were subject to creep at a stress of 550 MPa and a temperature of 520 °C. Slip trace and TEM microstructural observations reveal that primary oc...

W. Zhu, I. P. Jones, D. Fort, R. E. Smallman in MRS Online Proceedings Library (1996)

Article

Creep Deformation of a Fully Lamellar Gamma Based Titanium Aluminide Alloy

A complex two phase γ-TiAl alloy, Ti-47Al-lCr-1Mn-2Ta-0.2Si (at.%) in a fully lamellar condition, has been creep tested at a stress of 200MPa and a temperature of 700°C. This simulates the in-service operating...

F. Herrouin, P. Bowen, I. P. Jones in MRS Online Proceedings Library (1996)

Article

Influence of Substrate Preparation on the Two-Stage MOCVD of CdTe on (001)GaAs

A TEM study of the initial nucleation layers for the two-step growth of CdTe on 2°-off (001) GaAs substrates by MOCVD is presented. When the substrates are degreased and etched in the usual manner, the initial...

T. T. Cheng, M. Aindow, I. P. Jones, J. E. Hails… in MRS Online Proceedings Library (1994)

Article

Site Occupation of Excess Al Atoms in Off-Stoichiometric γ-Tial: Measurement of Debye-Waller Factors

In recent years, the determination of x-ray structure factors and hence the electron charge density distribution in TiAl has received considerable attention. Experimental assessment of electron charge densitie...

S. Swaminathan, I. P. Jones, D. M. Maher, H. L. Fraser in MRS Online Proceedings Library (1994)

Article

Defect Anisotropy in Movpe CdTe/GaAs

A cross-sectional TEM study of the defect structure in CdTe buffer layers grown on 2° off (001) GaAs substrates by MOVPE is presented. The nature and distribution of defects in the buffer layers are shown to b...

T. T. Cheng, M. Aindow, I. P. Jones, J. E. Hails… in MRS Online Proceedings Library (1992)

Article

Antiphase Boundary Tubes in Ordered Intermetallic Compounds

TEM observations suggest the presence of edge-type strain fields around antiphase boundary tubes in deformed L1₂ compounds such as Ni₃Al and Fe₃Ge. The present paper aims at discussing the origin of these strain ...

Alfonso H. W. Ngan, I. P. Jones, R. E. Smallman in MRS Online Proceedings Library (1992)