Imperial College London

Professor WE (Bill) Lee FREng

Faculty of EngineeringInstitute for Security Science & Technology

Co-Director of Institute for Security Science and Technology
 
 
 
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Contact

 

+44 (0)20 7594 6733w.e.lee Website

 
 
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Assistant

 

Ms Denise McGurk +44 (0)20 7594 8864

 
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Location

 

Central LibrarySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

389 results found

Zhang H, Jayaseelan DD, Bogomol I, Reece MJ, Hu C, Grasso S, Lee WEet al., 2019, A novel microstructural design to improve the oxidation resistance of ZrB <inf>2</inf> -SiC ultra-high temperature ceramics (UHTCs), Journal of Alloys and Compounds, Pages: 958-964, ISSN: 0925-8388

© 2019 Directionally Solidified 72.8 mol% ZrB 2 - 27.2 mol% SiC (equivalent to 20 vol%) composite was fabricated using a crucibleless-melting technique. Microstructural and XRD analyses confirmed the texturing of grains and lamellar structure. The Lotgering (00l) orientation factor was as high as 0.97. The thickness of the lamellae was about 5 μm. Bright-field TEM images confirmed that the eutectic composite has continuous ZrB 2 and SiC phases. Electron diffraction patterns from both the ZrB 2 and SiC phases were indexed as hexagonal and 3C-cubic structures, respectively. Line defects such as dislocations, planar defects such as stacking faults and twins were observed in the SiC. Oxidation studies performed at 1873K for 1 h demonstrated that the samples obtained by melting showed an improved oxidation resistance compared to ZrB 2 -SiC composites obtained via sintering due to the formation of a passivating continuous SiO 2 layer. The oxidation mechanisms are discussed, the orientation and SiC lamellae acted as an effective barrier to the inward oxygen flux and played a key role in retarding oxidation.

JOURNAL ARTICLE

Gasparrini C, Podor R, Fiquet O, Horlait D, May S, Wenman MR, Lee WEet al., 2019, Uranium carbide oxidation from 873 K to 1173 K, Corrosion Science, ISSN: 0010-938X

© 2019 Elsevier Ltd Oxidation of UC was studied from 873 to 1173 K in air and in 10 Pa oxygen using a High Temperature Environmental SEM (HT-ESEM). Conversion to U 3 O 8 improved when using 873 K as the oxide product was a fine powder. At higher temperatures (973 K to 1173 K) oxidation slowed due to a densification process with formation of coarse fragments. The oxide fragmentation at 973 K and 1073 K and oxide pulverisation at 873 K were observed in situ in a HT-ESEM. Cracking induced fragmentation and pulverisation was linked to stresses generated from the volumetric transformation from UC to U 3 O 8 .

JOURNAL ARTICLE

Pletser D, Ohashi T, Yoshii Y, Lee WEet al., 2018, Temperature dependent volatilisation behaviour of Cs from two commercial adsorbents used at Fukushima measured using novel experimental apparatus, PROGRESS IN NUCLEAR ENERGY, Vol: 109, Pages: 214-222, ISSN: 0149-1970

JOURNAL ARTICLE

Giorgi E, Grasso S, Zapata-Solvas E, Lee WEet al., 2018, Reactive carbothermal reduction of ZrC and ZrOC using Spark Plasma Sintering, ADVANCES IN APPLIED CERAMICS, Vol: 117, Pages: S34-S47, ISSN: 1743-6753

JOURNAL ARTICLE

Hsieh Y-H, Humphry-Baker SA, Horlait D, Gregg DJ, Vance ER, Lee WEet al., 2018, Durability of hot uniaxially pressed Synroc derivative wasteform for EURO-GANEX wastes, JOURNAL OF NUCLEAR MATERIALS, Vol: 509, Pages: 43-53, ISSN: 0022-3115

JOURNAL ARTICLE

Humphry-Baker SA, Harrison RW, Greaves G, Knowles AJ, Smith GDW, Donnelly SE, Lee WEet al., 2018, A candidate fusion engineering material, WC-FeCr, SCRIPTA MATERIALIA, Vol: 155, Pages: 129-133, ISSN: 1359-6462

JOURNAL ARTICLE

Fossati PCM, Rushton MJD, Lee WE, 2018, Atomic-scale description of interfaces in rutile/sodium silicate glass-crystal composites, PHYSICAL CHEMISTRY CHEMICAL PHYSICS, Vol: 20, Pages: 17624-17636, ISSN: 1463-9076

JOURNAL ARTICLE

Gasparrini C, Chater RJ, Horlait D, Vandeperre L, Lee WEet al., 2018, Zirconium carbide oxidation: Kinetics and oxygen diffusion through the intermediate layer, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 101, Pages: 2638-2652, ISSN: 0002-7820

JOURNAL ARTICLE

Patra N, Al Nasiri N, Jayaseelan DD, Lee WEet al., 2018, Thermal properties of C-f/HfC and C-f/HfC-SiC composites prepared by precursor infiltration and pyrolysis, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Vol: 38, Pages: 2297-2303, ISSN: 0955-2219

JOURNAL ARTICLE

Chinnam RK, Fossati PCM, Lee WE, 2018, Degradation of partially immersed glass: A new perspective, JOURNAL OF NUCLEAR MATERIALS, Vol: 503, Pages: 56-65, ISSN: 0022-3115

JOURNAL ARTICLE

Ojovan MI, Burakov BE, Lee WE, 2018, Radiation-induced microcrystal shape change as a mechanism of wasteform degradation, JOURNAL OF NUCLEAR MATERIALS, Vol: 501, Pages: 162-171, ISSN: 0022-3115

JOURNAL ARTICLE

Lerdprom W, Bhowmik A, Grasso S, Zapata-Solvas E, Jayaseelan DD, Reece MJ, Lee WEet al., 2018, Impact of spark plasma sintering (SPS) on mullite formation in porcelains, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 101, Pages: 525-535, ISSN: 0002-7820

JOURNAL ARTICLE

Zapata-Solvas E, Gomez-Garcia D, Dominguez-Rodriguez A, Lee WEet al., 2018, High temperature creep of 20 vol%. SiC-HfB2 UHTCs up to 2000 degrees C and the effect of La2O3 addition, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Vol: 38, Pages: 47-56, ISSN: 0955-2219

JOURNAL ARTICLE

Lerdprom W, Zapata-Solvas E, Jayaseelan DD, Borrell A, Salvador MD, Lee WEet al., 2017, Impact of microwave processing on porcelain microstructure, CERAMICS INTERNATIONAL, Vol: 43, Pages: 13765-13771, ISSN: 0272-8842

JOURNAL ARTICLE

Gasparrini C, Podor R, Horlait D, Chater R, Lee WEet al., 2017, Zirconium Carbide Oxidation: Maltese Cross Formation and Interface Characterization, Oxidation of Metals, Vol: 88, Pages: 509-519, ISSN: 0030-770X

© 2016, The Author(s). Oxidation of dense hot-pressed ZrC specimens from 1073 to 1473 K was investigated using an in situ technique: HT-ESEM. Cuboid specimens were monitored on the surface and on edges and corners during oxidation in order to understand the influence of crack formation and propagation on the Maltese cross shape development of the oxide. The oxidation mechanism comprised three steps: (1) delamination of sample edges, (2) crack formation at corners and (3) crack propagation towards the inner core and formation of microcracks parallel to the interface that increase the accessible surface area followed by a drastic volume expansion. The microcrack pattern is found to be repetitive as if a cyclic debonding of the interface occurred. Characterization of the interface by TEM and HRTEM revealed the interface between ZrC and ZrO2 to comprise a 2 µm thick amorphous carbon matrix with ZrO2 nanocrystals embedded in it.

JOURNAL ARTICLE

Gasparrini C, Podor R, Horlait D, Rushton MJD, Fiquet O, Lee WEet al., 2017, Oxidation of UC: An in situ high temperature environmental scanning electron microscopy study, JOURNAL OF NUCLEAR MATERIALS, Vol: 494, Pages: 127-137, ISSN: 0022-3115

JOURNAL ARTICLE

Humphry-Baker SA, Peng K, Lee WE, 2017, Oxidation resistant tungsten carbide hardmetals, INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, Vol: 66, Pages: 135-143, ISSN: 0263-4368

JOURNAL ARTICLE

Zapata-Solvas E, Hadi MA, Horlait D, Parfitt DC, Thibaud A, Chroneos A, Lee WEet al., 2017, Synthesis and physical properties of (Zr1-x,Ti-x)(3)AlC2 MAX phases, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 100, Pages: 3393-3401, ISSN: 0002-7820

JOURNAL ARTICLE

Al Nasiri N, Patra N, Jayaseelan DD, Lee WEet al., 2017, Water vapour corrosion of rare earth monosilicates for environmental barrier coating application, CERAMICS INTERNATIONAL, Vol: 43, Pages: 7393-7400, ISSN: 0272-8842

JOURNAL ARTICLE

Bai Y, Qi X, Duff A, Li N, Kong F, He X, Wang R, Lee WEet al., 2017, Density functional theory insights into ternary layered boride MoAlB, ACTA MATERIALIA, Vol: 132, Pages: 69-81, ISSN: 1359-6454

JOURNAL ARTICLE

Faber KT, Asefa T, Backhaus-Ricoult M, Brow R, Chan JY, Dillon S, Fahrenholtz WG, Finnis MW, Garay JE, Garcia RE, Gogotsi Y, Haile SM, Halloran J, Hu J, Huang L, Jacobsen SD, Lara-Curzio E, LeBeau J, Lee WE, Levi CG, Levin I, Lewis JA, Lipkin DM, Lu K, Luo J, Maria J-P, Martin LW, Martin S, Messing G, Navrotsky A, Padture NP, Randall C, Rohrer GS, Rosenflanz A, Schaedler TA, Schlom DG, Sehirlioglu A, Stevenson AJ, Tani T, Tikare V, Trolier-McKinstry S, Wang H, Yildiz Bet al., 2017, The role of ceramic and glass science research in meeting societal challenges: Report from an NSF-sponsored workshop, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 100, Pages: 1777-1803, ISSN: 0002-7820

JOURNAL ARTICLE

Zapata-Solvas E, Christopoulos S-RG, Ni N, Parfitt DC, Horlait D, Fitzpatrick ME, Chroneos A, Lee WEet al., 2017, Experimental synthesis and density functional theory investigation of radiation tolerance of Zr-3(Al1-xSix)C-2 MAX phases, JOURNAL OF THE AMERICAN CERAMIC SOCIETY, Vol: 100, Pages: 1377-1387, ISSN: 0002-7820

JOURNAL ARTICLE

Kota S, Zapata-Solvas E, Chen Y, Radovic M, Lee WE, Barsoum MWet al., 2017, Isothermal and Cyclic Oxidation of MoAlB in Air from 1100 degrees C to 1400 degrees C, JOURNAL OF THE ELECTROCHEMICAL SOCIETY, Vol: 164, Pages: C930-C938, ISSN: 0013-4651

JOURNAL ARTICLE

Lerdprom W, Grasso S, Jayaseelan DD, Reece MJ, Lee WEet al., 2017, Densification behaviour and physico-mechanical properties of porcelains prepared using spark plasma sintering, ADVANCES IN APPLIED CERAMICS, Vol: 116, Pages: 307-315, ISSN: 1743-6753

JOURNAL ARTICLE

Ojovan MI, Burakov BE, Lee WE, 2017, Destruction of Micro-crystal Containing Wasteforms by Charge-induced Crystal Shape Change on Self-irradiation, MRS ADVANCES, Vol: 2, Pages: 621-626, ISSN: 2059-8521

JOURNAL ARTICLE

Juthapakdeeprasert J, Lerdprom W, Jayaseelan DD, Lee WEet al., 2017, Cerium-Added alumina and cerium-Added zircon as high emissivity coatings for cement rotary kilns, Pages: 404-411

CONFERENCE PAPER

Lerdprom W, Li C, Jayaseelan DD, Skinner SJ, Lee WEet al., 2017, Temperature dependence of electrical conductivity of a green porcelain mixture, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Vol: 37, Pages: 343-349, ISSN: 0955-2219

JOURNAL ARTICLE

Burr PA, Horlait D, Lee WE, 2017, Experimental and DFT investigation of (Cr, Ti)(3)AlC2 MAX phases stability, MATERIALS RESEARCH LETTERS, Vol: 5, Pages: 144-157, ISSN: 2166-3831

JOURNAL ARTICLE

Lerdprom W, Chinnam RK, Jayaseelan DD, Lee WEet al., 2016, Porcelain production by direct sintering, JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, Vol: 36, Pages: 4319-4325, ISSN: 0955-2219

JOURNAL ARTICLE

Cedillos-Barraza O, Manara D, Boboridis K, Watkins T, Grasso S, Jayaseelan DD, Konings RJM, Reece MJ, Lee WEet al., 2016, Investigating the highest melting temperature materials: A laser melting study of the TaC-HfC system, SCIENTIFIC REPORTS, Vol: 6, ISSN: 2045-2322

JOURNAL ARTICLE

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