Binner, Jon

Brown, Peter

Paul, Anish

Vaidhyanathan, Bala

Venugopal, Saranya

English

Engineering Conferences International

Engineering Conferences InternationalECI Digital ArchivesUltra-High Temperature Ceramics: Materials ForExtreme Environmental Applications II ProceedingsSpring 5-14-2012Sol-gel synthesis and characterization of Hf B2powdersSaranya VenugopalLoughborough UniversityAnish PaulLoughborough UniversityJon BinnerLoughborough UniversityBala VaidhyanathanLoughborough UniversityPeter BrownDSTLFollow this and additional works at: http://dc.engconfintl.org/uhtcPart of the Materials Science and Engineering CommonsThis Conference Proceeding is brought to you for free and open access by the Proceedings at ECI Digital Archives. It has been accepted for inclusion inUltra-High Temperature Ceramics: Materials For Extreme Environmental Applications II by an authorized administrator of ECI Digital Archives. Formore information, please contact franco@bepress.com.Recommended CitationSaranya Venugopal, Anish Paul, Jon Binner, Bala Vaidhyanathan, and Peter Brown, "Sol-gel synthesis and characterization of Hf B2powders" in "Ultra-High Temperature Ceramics: Materials For Extreme Environmental Applications II", W. Fahrenholtz, MissouriUniv. of Science & Technology; W. Lee, Imperial College London; E.J. Wuchina, Naval Service Warfare Center; Y. Zhou, AerospaceResearch Institute Eds, ECI Symposium Series, (2013). http://dc.engconfintl.org/uhtc/28Sol-gel synthesis and characterization of HfB2 powdersSaranya Venugopal*, Anish Paul, Jon Binner & Bala VaidhyanathanLoughborough UniversityPeter Brown, DSTLHernstein, Austria15 May 20121 Hernstein, 15 MayCarbon source: Phenolic resinMetal precursor (HfCl4 and H3BO3 for HfB2)HfB2 precursor synthesisi. Carbon content Excess carbon and stoichiometric carbonHernstein, 15 May2Carbo/boro thermal reduction of dried gel at 1300oC -1600oC under argon atmosphereHomogeneous mixing for 24 hDried in an oven and crushed into fine powderii. Heat treatment for carb /borothermal reduction reaction  1300oC (with the help of AFRL) and 1600oCHeat treatment used and the resulting microstructure040080012001600Temperature / oC1600oC-5 h1300oC-25 h100 nm100 nmExcess C: 1600oC, 5 hC extracted: 500oC0 20 40 60Time / h2 µmNo excess C: 1600oC, 5 hNo excess C: 1300oC, 25 h2 µm2 µm3 Hernstein, 15 MayLPR Pitch SucrosePPRHfB2 powder microstructure depending on the C sources2 µm 2 µm 2 µm2 µmGraphite2 µmMWCNT2 µmPPR4 Hernstein, 15 MayVisit poster number 11 to chat more about the results !!! ☺5 Hernstein, 15 MayThank You

Sol-gel synthesis and characterization of HfB2 powders

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Sol-gel synthesis and characterization of HfB2 powders

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