Acta Metall Sin  1996, Vol. 32 Issue (6): 565-572    DOI:

Current Issue | Archive | Adv Search |

SNOEK-KOSTER RELAXATION IN Ta-O SOLID SOLUTIONS

FANG Qianfeng (Laboratory of Internal Friction and Defects in Solids; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031)

FANG Qianfeng (Laboratory of Internal Friction and Defects in Solids; Institute of Solid State Physics; Chinese Academy of Sciences; Hefei 230031). SNOEK-KOSTER RELAXATION IN Ta-O SOLID SOLUTIONS. Acta Metall Sin, 1996, 32(6): 565-572.

Abstract References Related Articles Recommended Metrics Download:  PDF(563KB)  Export:  BibTeX | EndNote (RIS)       Abstract  After coating the specimen with a thin Ti layer, the Snoek-Koster relaxation is systematically investigated without the effect of oxygen pick up. Two relatively stable internal friction peaks, SK1 at lower temperature and SK2 at higher temperature, are observed in deformed Ta-O samples. The changes of their peak shape and stability with annealing at different oxygen content are experimentally studied. The activation energies of SK1 and SK2 are measured to be 1 .4 and 2.1 eV respectively. It is suggested that the SK1 corresponds to the geometrical kink migration on screw dislocations and the SK2 corresponds to the formation and migration of kink-pairs on screw dislocations. From experimental results it is estimated that the energy of kink pair formation is about 0.9 eV and the binding energy of screw dislocation with oxygen atom is about 0.3 eV. It is additionally found that the height of the Snoek peak does not change after further deformation. Key words:  Snoek-Koster relaxation      Ta-O solid solution      Snoek peak      Received:  18 June 1996      Service E-mail this article Add to citation manager E-mail Alert RSS （） Articles by authors URL:  https://www.ams.org.cn/EN/     OR     https://www.ams.org.cn/EN/Y1996/V32/I6/565 1SchockG,MondinoM,JPhysSocJpn,1963;18(Suppl．Ⅰ):1492BooneDH,WertCA,JPhysSocJpn,1963;18(Suppl．Ⅰ):1413LamotteEDe,WertC．JphysSocJpn,1964;19(Suppl．Ⅰ):15604SeegerA,WellerM,DiehlJ,PanZL,ZhangJX,TS．ZMetallk,1982;73:15WellerM,JPhys;Colloq,1983;(C9):636张进修,潘正良．金属学报,1985;21:A1007MolinasBJ,WellerM,SchulzeK,DiehlJ．JPhysColloq,1987;(C8):3418BevingtonPR,DataReductionandErrorAnalysisforthePhysicalSciences．NewYork:McGraw-Hill,1969:2359HaneczokG,WellerM．JLess-CommonMet．1990;159:26910PareVK．JApplPhys,1961;32:33211SchultzH．MaterSciEng,1991;141:A14912WernerM．PhysStatusSolidi,1987;104a:6313FunkG,SchultzH．ZMetallk,1985;76:31114BaurJ,BenoitW,SchultzH．ActaMetall,1989;37:115915D′AnnaG,BenoitW．MaterSciForum1993;119-121:165 No related articles found! No Suggested Reading articles found! Viewed Full text Abstract Cited   Shared      Discussed