Pub Date : 1977-12-15DOI: 10.2355/isijinternational1966.17.732
R. Ohno
Synopsis The eva/)oration-rate COllstallt K i (kg . m2 .r l ).for each o.f mallgalleJe, cupper alld sulfur in the vacuum induction melting qf iroll alloys has beell rletermilled . The rale cOllslnll1 Kv or K~ (kg . m2 . r ' ).!or the va/Jori :;:alion o.f these elements al the vacuum-melt interface is calculaled. I II each Q( the FeCMn, FcCCu and FcCSiS vstems, the value Q( K i at a lower stirring rale is about one half o.f Ihat at a higher stirring rate; hence mass trans.fer in the melt must be involved in the rate-determining ste/).fol' their evaporation at the lower slirring rale. In the FeCu and FeMn syslems, the value of Kcu at J 973 K is obviously g realer thall that at J 873 K , but those of KM n at bolh lemperatures nre close to each olher. The rales o.f evaporation o.f manganese must be determined prer/ominanliv by Ihe rale qf ils trallsf er in Ihe meLl in view of the vaLues o.f pK ", at both temperatures, which were calcul(lted on Ihe basis q( the equatioll K i = p K",Kvl (.oK", + Kv ), where p (kg .mO) is the densi!)' o.f the meLt and K ,n (m . sI ) is Ihe mass-tranrfer co~fficien t in the melt. i n the Fe-M n, Fe-Cu and FeS n sy slems at J 873 K , most o( the reported experimental values o.f K,II n' Kcu and KSn agree well with their respective values ca!CIl/ated from Ihe equatioll b_v laking .oK", = 6.8 x 101 (kg . m2. s' ), but the present experimenlal values Qf Kcu are smaller than the calculaled value. The plols o.f Ksl.fs vs . as; in Ihe FeSisystem are Linear at two different stirring rates. The rate (onstanls k, and k2 given by this linear relation at a lower stirring rale are smaller than those al a higher slirring role, respectively, and must involve K'lL' III the desulfuri;;ation (I.f FeS, F CS, Fe-Si -5 and FeCSiS alloys at temperatures in the range 1 688J 873 K , the relatioll between K s and K: is rep resented by a curve calculated .from the equation by taking Kv= O.24 K : and p K,n =2. 5 regardless o.f the lemperatures and the alloy systems. This value o.f .oK", is much greater than the value o.f .oK", f or FeMn , F e-C u and FeSn systems. Oxy gCll and sulfur hardly affect Ihe rate of evaporation o.f copper .from molten iroll at J 873 K .
{"title":"Kinetics of Evaporation of Manganese, Copper and Sulfur from Iron Alloys in Vacuum Induction Melting(Metallurgy)","authors":"R. Ohno","doi":"10.2355/isijinternational1966.17.732","DOIUrl":"https://doi.org/10.2355/isijinternational1966.17.732","url":null,"abstract":"Synopsis The eva/)oration-rate COllstallt K i (kg . m2 .r l ).for each o.f mallgalleJe, cupper alld sulfur in the vacuum induction melting qf iroll alloys has beell rletermilled . The rale cOllslnll1 Kv or K~ (kg . m2 . r ' ).!or the va/Jori :;:alion o.f these elements al the vacuum-melt interface is calculaled. I II each Q( the FeCMn, FcCCu and FcCSiS vstems, the value Q( K i at a lower stirring rale is about one half o.f Ihat at a higher stirring rate; hence mass trans.fer in the melt must be involved in the rate-determining ste/).fol' their evaporation at the lower slirring rale. In the FeCu and FeMn syslems, the value of Kcu at J 973 K is obviously g realer thall that at J 873 K , but those of KM n at bolh lemperatures nre close to each olher. The rales o.f evaporation o.f manganese must be determined prer/ominanliv by Ihe rale qf ils trallsf er in Ihe meLl in view of the vaLues o.f pK \", at both temperatures, which were calcul(lted on Ihe basis q( the equatioll K i = p K\",Kvl (.oK\", + Kv ), where p (kg .mO) is the densi!)' o.f the meLt and K ,n (m . sI ) is Ihe mass-tranrfer co~fficien t in the melt. i n the Fe-M n, Fe-Cu and FeS n sy slems at J 873 K , most o( the reported experimental values o.f K,II n' Kcu and KSn agree well with their respective values ca!CIl/ated from Ihe equatioll b_v laking .oK\", = 6.8 x 101 (kg . m2. s' ), but the present experimenlal values Qf Kcu are smaller than the calculaled value. The plols o.f Ksl.fs vs . as; in Ihe FeSisystem are Linear at two different stirring rates. The rate (onstanls k, and k2 given by this linear relation at a lower stirring rale are smaller than those al a higher slirring role, respectively, and must involve K'lL' III the desulfuri;;ation (I.f FeS, F CS, Fe-Si -5 and FeCSiS alloys at temperatures in the range 1 688J 873 K , the relatioll between K s and K: is rep resented by a curve calculated .from the equation by taking Kv= O.24 K : and p K,n =2. 5 regardless o.f the lemperatures and the alloy systems. This value o.f .oK\", is much greater than the value o.f .oK\", f or FeMn , F e-C u and FeSn systems. Oxy gCll and sulfur hardly affect Ihe rate of evaporation o.f copper .from molten iroll at J 873 K .","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"5 1","pages":"86-87"},"PeriodicalIF":0.0,"publicationDate":"1977-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77331444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1977-10-01DOI: 10.1080/14786437708239765
M. Koiwa
Abstract A matrix method for calculating the number of visits to the origin in random-walks on periodic lattices is developed. The method is applied to three-dimensional lattices: the f.c.c., b.c.c. and the diamond lattices. For the f.c.c. and the b.c.c. lattices the results are in good agreement with those obtained by Montroll. The probability of eventual return in the diamond lattice is evaluated for the first time: it is about 0·442. A new concept, the effective coordination number, is defined on the basis of a calculation of random walks on an imaginary lattice.
{"title":"Random Walks on Three-Dimensional Lattices : A Matrix Method for Calculating the Probability of Eventual Return(Physics)","authors":"M. Koiwa","doi":"10.1080/14786437708239765","DOIUrl":"https://doi.org/10.1080/14786437708239765","url":null,"abstract":"Abstract A matrix method for calculating the number of visits to the origin in random-walks on periodic lattices is developed. The method is applied to three-dimensional lattices: the f.c.c., b.c.c. and the diamond lattices. For the f.c.c. and the b.c.c. lattices the results are in good agreement with those obtained by Montroll. The probability of eventual return in the diamond lattice is evaluated for the first time: it is about 0·442. A new concept, the effective coordination number, is defined on the basis of a calculation of random walks on an imaginary lattice.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"15 1","pages":"77"},"PeriodicalIF":0.0,"publicationDate":"1977-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75281480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The Fermi surfaces of Cu–Pd alloys below 63% Pd are studied by means of the angular correlation of positron annihilation with crossed- and long-slit geometries. The - and -radii decrease with increasing palladium content up to 30% in agreement with a calculation based on the rigid band model. The neck radius also decreases with increasing composition, and it is suggested that the Fermi surface detaches from the hexagonal face of the Brillouin zone around 20% Pd, but remains to bulge in this direction at higher compositions. No detectable change is found in the correlation curves of the ordered and disordered states at 15 and 19% Pd. The origin of stabilization of the long period ordered structure near Cu 3 Pd is discussed in the light of the present results.
{"title":"The Fermi Surfaces of Cu-Pd Alloys Studied by Positron Annihilation(Physics)","authors":"M. Hasegawa, Toshiharu Suzuki, M. Hirabayashi","doi":"10.1143/JPSJ.43.89","DOIUrl":"https://doi.org/10.1143/JPSJ.43.89","url":null,"abstract":"The Fermi surfaces of Cu–Pd alloys below 63% Pd are studied by means of the angular correlation of positron annihilation with crossed- and long-slit geometries. The - and -radii decrease with increasing palladium content up to 30% in agreement with a calculation based on the rigid band model. The neck radius also decreases with increasing composition, and it is suggested that the Fermi surface detaches from the hexagonal face of the Brillouin zone around 20% Pd, but remains to bulge in this direction at higher compositions. No detectable change is found in the correlation curves of the ordered and disordered states at 15 and 19% Pd. The origin of stabilization of the long period ordered structure near Cu 3 Pd is discussed in the light of the present results.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"24 1","pages":"78"},"PeriodicalIF":0.0,"publicationDate":"1977-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83203077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1977-01-01DOI: 10.1016/B978-0-12-468750-9.50036-X
Y. Syono, T. Goto, Y. Nakagawa
{"title":"Phase-Transition Pressures of Fe_3O_4 and GaAs Determined from Shock-Compression Experiments(Physics)","authors":"Y. Syono, T. Goto, Y. Nakagawa","doi":"10.1016/B978-0-12-468750-9.50036-X","DOIUrl":"https://doi.org/10.1016/B978-0-12-468750-9.50036-X","url":null,"abstract":"","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"31 1","pages":"463-476"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87160357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1977-01-01DOI: 10.1007/978-1-4613-4178-9_35
T. Masumoto, K. Watanabe, M. Mitera, S. Ohnuma
{"title":"High Magnetic Permeability Amorphous Alloys of the Fe-Ni-Si-B System(Metallurgy)","authors":"T. Masumoto, K. Watanabe, M. Mitera, S. Ohnuma","doi":"10.1007/978-1-4613-4178-9_35","DOIUrl":"https://doi.org/10.1007/978-1-4613-4178-9_35","url":null,"abstract":"","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"91 1","pages":"88"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72821731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1977-01-01DOI: 10.2320/JINSTMET1952.41.8_795
M. Tokiwai, S. Morozumi
{"title":"Diffusion of Hydrogen at High Temperatures in the Group V Transition Metals and Alloying Effect on the Diffusion(Metallurgy)","authors":"M. Tokiwai, S. Morozumi","doi":"10.2320/JINSTMET1952.41.8_795","DOIUrl":"https://doi.org/10.2320/JINSTMET1952.41.8_795","url":null,"abstract":"","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"10 1","pages":"93-94"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86142834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1977-01-01DOI: 10.2320/MATERTRANS1960.18.635
A. Inoue, T. Ogura, T. Masumoto
Transmission electron microscopic observations were made on the recovery process of lattice defects in cementite in high carbon steels annealed after 92%cold rolling. Thermomagnetic and X-ray analyses were also performed as additional examinations. No observable change in the defect structure of cementite occurs at temperatures below about 400°C.Annealing at higher temperatures results in the disappearance of the moirc pattern, a considerable decrease of dislocation density and the formation of well-developed subboundaries. Above about 600°C, these defects disappear gradually with the progress of spheroidization. These results suggest that the recovery of lattice defects in cementite is caused by polygonization accompanied by climbing or cross slipping of dislocations.
{"title":"Recovery of Lattice Defects in Cementite in Cold-Rolled Carbon Steels(Metallurgy)","authors":"A. Inoue, T. Ogura, T. Masumoto","doi":"10.2320/MATERTRANS1960.18.635","DOIUrl":"https://doi.org/10.2320/MATERTRANS1960.18.635","url":null,"abstract":"Transmission electron microscopic observations were made on the recovery process of lattice defects in cementite in high carbon steels annealed after 92%cold rolling. Thermomagnetic and X-ray analyses were also performed as additional examinations. No observable change in the defect structure of cementite occurs at temperatures below about 400°C.Annealing at higher temperatures results in the disappearance of the moirc pattern, a considerable decrease of dislocation density and the formation of well-developed subboundaries. Above about 600°C, these defects disappear gradually with the progress of spheroidization. These results suggest that the recovery of lattice defects in cementite is caused by polygonization accompanied by climbing or cross slipping of dislocations.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"73 1","pages":"88"},"PeriodicalIF":0.0,"publicationDate":"1977-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89164234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1976-01-01DOI: 10.5006/0010-9312-32.4.146
M. Naka, K. Hashimoto, T. Masumoto
Abstract The corrosion resistance of amorphous iron alloys, whose practical application is expected because of their outstanding mechanical properties, has been studied by total immersion tests and...
非晶铁合金具有优异的力学性能，有望在实际应用中得到广泛应用。
{"title":"High Corrosion Resistance of Chromium-Bearing Amorphous Iron Alloys in Neutral and Acidic Solutions Containing Chloride","authors":"M. Naka, K. Hashimoto, T. Masumoto","doi":"10.5006/0010-9312-32.4.146","DOIUrl":"https://doi.org/10.5006/0010-9312-32.4.146","url":null,"abstract":"Abstract The corrosion resistance of amorphous iron alloys, whose practical application is expected because of their outstanding mechanical properties, has been studied by total immersion tests and...","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"1 1","pages":"95-95"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83454960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1976-01-01DOI: 10.2320/JINSTMET1952.41.2_111
H. Fujimori, K. Arai, Hisanori Shirae, H. Saito, T. Masumoto, N. Tsuya
{"title":"High Permeability Properties of Amorphous Co-Fe Base Alloys","authors":"H. Fujimori, K. Arai, Hisanori Shirae, H. Saito, T. Masumoto, N. Tsuya","doi":"10.2320/JINSTMET1952.41.2_111","DOIUrl":"https://doi.org/10.2320/JINSTMET1952.41.2_111","url":null,"abstract":"","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"28 1","pages":"294"},"PeriodicalIF":0.0,"publicationDate":"1976-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90549968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
By rapid quenching of the melt, an amorphous phase of yttrium-cobalt-boron system was obtained. The phase is stable at room temperature, and its crystallization takes place in the vicinity of 700°C on heating at 10°C/min. Electrical resistivity of the amorphous phase is constant at about 10−3Ωcm in the temperature range below 660°C; the variation in the resistivity with the transition from the amorphous to the equilibrium state was measured.
{"title":"Amorphous Phase in Yttrium-Cobalt-Boron System","authors":"S. Yajima, K. Okamura, T. Shishido","doi":"10.1246/CL.1975.1227","DOIUrl":"https://doi.org/10.1246/CL.1975.1227","url":null,"abstract":"By rapid quenching of the melt, an amorphous phase of yttrium-cobalt-boron system was obtained. The phase is stable at room temperature, and its crystallization takes place in the vicinity of 700°C on heating at 10°C/min. Electrical resistivity of the amorphous phase is constant at about 10−3Ωcm in the temperature range below 660°C; the variation in the resistivity with the transition from the amorphous to the equilibrium state was measured.","PeriodicalId":21586,"journal":{"name":"Science reports of the Research Institutes, Tohoku University. Ser. A, Physics, chemistry and metallurgy","volume":"119 1","pages":"87-88"},"PeriodicalIF":0.0,"publicationDate":"1975-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76776456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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