caa a22 4500 467946159 CHVBK 20180322200725.0 cr unu---uuuuu 170328e19861101xx s 000 0 eng 10.1007/PL00020274 doi (NATIONALLICENCE)springer-10.1007/PL00020274 (NATIONALLICENCE)springer-10.1007/BF02431644 High-temperature creep and dislocation structure of MgO single crystals at low stresses [Elektronische Daten] [K. Ramesh, Eiichi Yasuda, Shiushichi Kimura, Kazuyori Urabe] MgO single crystals oriented toward (100) have been compressively deformed to strains in the range of 0.04 to 0.09 at temperatures between 1948 and 2023 K using stresses under 6 MPa. Microstructural developments in the crept samples were monitored by etch pitting, SEM and HVEM. Optical microscopy revealed an equiaxed network of subgrains with 〈110〉 forming the framework for the formation of subgrains. Measurement of the dislocation density not associated with cells reveals that the stress dependence of the steady-state values of dislocation density can be described by the relationϱ ∫σ 2.15. HVEM observations show that cell boundaries are formed by the process of knitting. Drastic unloading results in a fraction of the sub-boundaries straightening, but the majority of the boundaries are destroyed. It is concluded that creep of MgO at low stresses and high temperature is similar to those of fcc metals. Chapman and Hall Ltd., 1986 Ramesh K. Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, 227, Yokohama, Japan aut Yasuda Eiichi Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, 227, Yokohama, Japan aut Kimura Shiushichi Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, 227, Yokohama, Japan aut Urabe Kazuyori Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, 153, Tokyo, Japan aut Journal of Materials Science Kluwer Academic Publishers 21/11(1986-11-01), 4015-4018 0022-2461 21:11<4015 1986 21 10853 https://doi.org/10.1007/PL00020274 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00020274 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ramesh K. Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, 227, Yokohama, Japan aut NATIONALLICENCE 700 1- Yasuda Eiichi Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, 227, Yokohama, Japan aut NATIONALLICENCE 700 1- Kimura Shiushichi Research Laboratory of Engineering Materials, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, 227, Yokohama, Japan aut NATIONALLICENCE 700 1- Urabe Kazuyori Department of Inorganic Materials, Tokyo Institute of Technology, O-okayama, Meguro-ku, 153, Tokyo, Japan aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers 21/11(1986-11-01), 4015-4018 0022-2461 21:11<4015 1986 21 10853 NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02431644 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer