Download or read book Experimental Study of Factors Controlling the Effectiveness of High temperature Protective Coatings for Tungsten written by Jack Brett and published by . This book was released on 1965 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The restrictions imposed by the processes of diffusion, evaporation, and coating substrate reactions on the choice of potential protective coating materials for tungsten were studied analytically and experimentally. The diffusive restriction is the most limiting and eliminates many refractory oxides with otherwise satisfactory attributes. The diffusive properties of rare earth sesquioxides and complex refractory oxides were explored by means of oxidation experiments and a layer growth experiment respectively. Mass spectrometric studies of the vaporization of refractory complex oxides were carried out to determine the applicability of the Wagner-Hauffe method of predicting vaporization rates. Provided certain thermodynamic approximations are valid and the vapor species over the complex oxide are the same as those over the pure component oxides, the predictions yield order of magnitude accuracy. A survey and exploration of reactions of possible coating materials with tungsten was performed emphasizing promising materials from the diffusion studies. (Author).
Download or read book Experimental Study of Factors Controlling the Effectiveness of High temperature Protective Coatings for Tungsten written by C. D. Dickinson and published by . This book was released on 1963 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxidation at elevated temperatures of Zr-Th, Zr-Y, Hf-Y, Hf-W, Hf-W-Re, Al-Cr-Sn, and Al-LaSn alloys, as well as ZrN, HfN and ZrN-ThN combinations was studied in order to clarify specific aspects of the problem of protecting W against oxidation at high temperatures. Experimental results showed that there was much less tendency for ZrO2, ThO2 and HfO2 scales to crack during growth at high than at low temperatures. Multiphased scales were more resistanct to spalling than single-phased scales, and protective oxides were grown many alloys. However, even in sound and coherent scales composed of these oxides, O diffused so rapidly that it is doubtful that they could form the basis of a protective system at 2000 C. (Author).
Download or read book Experimental Study of Factors Controlling the Effectiveness of High temperature Protective Coatings for Tungsten written by C. D. Dickinson and published by . This book was released on 1963 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oxidation at elevated temperatures of Zr-Th, Zr-Y, Hf-Y, Hf-W, Hf-W-Re, Al-Cr-Sn, and Al-LaSn alloys, as well as ZrN, HfN and ZrN-ThN combinations was studied in order to clarify specific aspects of the problem of protecting W against oxidation at high temperatures. Experimental results showed that there was much less tendency for ZrO2, ThO2 and HfO2 scales to crack during growth at high than at low temperatures. Multiphased scales were more resistanct to spalling than single-phased scales, and protective oxides were grown many alloys. However, even in sound and coherent scales composed of these oxides, O diffused so rapidly that it is doubtful that they could form the basis of a protective system at 2000 C. (Author).
Download or read book Government wide Index to Federal Research Development Reports written by and published by . This book was released on 1965 with total page 1794 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Reports written by and published by . This book was released on 1964 with total page 2180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Summary of the Tenth Refractory Composites Working Group Meeting written by L. N. Hjelm and published by . This book was released on 1965 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Summary of the Tenth Meeting of the Refractory Composites Working Group written by E. S. Bartlett and published by . This book was released on 1965 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress in the Science and Technology of the Rare Earths written by Leroy Eyring and published by Elsevier. This book was released on 2013-09-17 with total page 373 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in the Science and Technology of the Rare Earths, Volume 2 is a collection of papers that details the advancement in various areas of rare earth technology. The coverage of the text includes the practical applications and methods of preparation of rare earth materials. The selection also covers topics about the various properties of rare earths, such as the molecular field model of exchange coupling in rare earth materials; thermodynamic and magnetic properties of the rare earth chalcogenides and pnictides; and structural and solid state chemistry of pure rare earth oxides. The book will be of great use to individuals involved in the research and development of technologies that utilize rare earth materials.
Download or read book Reports Received by Division of Technical Information Extension written by U.S. Atomic Energy Commission. Division of Technical Information and published by . This book was released on with total page 826 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reactor Materials written by and published by . This book was released on 1966 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Minerals Yearbook written by and published by . This book was released on 1966 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1973 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1990 with total page 1036 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book IBM 1401 Computer Produced and Maintained Keyword plus title KWPT Index for Reports Photographs and Specifications written by James H. Kennedy and published by . This book was released on 1964 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1972-04 with total page 1068 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Temperature Technology written by and published by . This book was released on 1964 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
