![]() ![]() XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 20.229910003460 diamond Inorganic materials 0.000 claims description 34.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority to BE631688D priority Critical patent/BE631688A/xx Priority to NL292060D priority patent/NL292060A/xx Priority to NL276481D priority patent/NL276481A/xx Priority claimed from US98618A external-priority patent/US3129061A/en Priority to GB7598/62A priority patent/GB938915A/en Priority to DEW31908A priority patent/DE1246683B/en Priority to CH357162A priority patent/CH412820A/en Priority to FR892271A priority patent/FR1323078A/en Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp Priority to US191145A priority patent/US3162507A/en Priority to GB13465/63A priority patent/GB977933A/en Priority to FR933326A priority patent/FR1370008A/en Publication of US3162507A publication Critical patent/US3162507A/en Application granted granted Critical Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee Westinghouse Electric Corp Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US191145A Inventor Steve N Dermatis Jr John W Faust Current Assignee (The listed assignees may be inaccurate. Google Patents Thick web dendritic growthĭownload PDF Info Publication number US3162507A US3162507A US191145A US19114562A US3162507A US 3162507 A US3162507 A US 3162507A US 191145 A US191145 A US 191145A US 19114562 A US19114562 A US 19114562A US 3162507 A US3162507 A US 3162507A Authority US United States Prior art keywords web dendritic melt seed dendrites Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. © 2017 American Chemical Society.This is an open access article published under an ACS AuthorChoice License, which permitsĬopying and redistribution of the article or any adaptations for non-commercial purposes.- Google Patents US3162507A - Thick web dendritic growth This process-control feature can result in different sizes and morphologies of cubic-zirconia and zirconolite crystals to facilitate the design of glass-ceramic waste forms for nuclear wastes.Ĭopyright, Publisher and Additional Information: The amount of zirconolite remained approximately 19 wt %, but the individual crystals were smaller and more homogeneously dispersed in the dendrite structure than those obtained from one-stage crystallization. A two-stage crystallization method was used to obtain different microstructures of zirconolite-based glass-ceramic. Rietveld quantitative analysis revealed that the maximum amount of zirconolite was ∼19 wt %. Scanning electron microscopy images show that the branches of the cubic-zirconia crystal had a snowflake-like appearance, while those in zirconolite were composed of many individual crystals. The dendrite cubic-zirconia showed highly oriented growth. Both cubic-zirconia and zirconolite crystals/particles show dendrite shapes, but with different dendrite branching. The size of the cubic-zirconia crystal could be controlled by temperature and dwelling time. ![]() Results show that all samples underwent a phase transformation from cubic-zirconia to zirconolite when crystallized at 900, 950, and 1000 ☌. In this study, both cubic-zirconia and zirconolite-based glass-ceramics were obtained by the crystallization of SiO2-CaO-Al2O3-TiO2-ZrO2-Nd2O3-Na2O glass. Glass-ceramics, with a specific crystalline phase assembly, can combine the advantages of glass and ceramic and avoid their disadvantages. ![]()
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