Journal of The Less Common Metals最新文献

{"title":"Caractéristiques mécaniques et chimiques des fibres de carbone protégées par un revêtement de carbure formé par dépôt chimique réactif","authors":"H. Vincent,&nbsp;C. Vincent,&nbsp;M.P. Berthet,&nbsp;H. Mourichoux,&nbsp;J. Bouix","doi":"10.1016/0022-5088(91)90348-8","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90348-8","url":null,"abstract":"<div><p>Silicon, titanium and boron carbide layers were formed on carbon fibres by reactive chemical vapour deposition (RCVD) using mixtures of SiCl₄-H₂-Ar, TiCl₄-H₂ and BCl₃-H₂ gases. Two types of fibres were considered: fibres made using a polyacrylonitrile precursor (ex-pan) and fibres made using a tar precursor (ex-brai). The mechanical properties of the coated fibres were determined on monofilaments. The high temperatures involved in RCVD resulted in degradation of the fibres. In order to use these fibres as reinforced aluminium-matrix composites, the influence of thermal treatment in air or in the presence of metal was investigated. In both cases, the coating decreased the carbon reactivity. In air, at 450°C, the properties of the fibres increased after a few minutes of treatment, whereas at 600°C, the tensile strength decreased in Une with the microcrystallinity of the oxides obtained. In the presence of liquid aluminium, the silicon carbide protects the fibres as long as there is no chemical reaction between the two components. In particular, silicon oxide, present as an impurity in the coating, easily reacts with the metal to produce defects on the fibre surface.</p></div>","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"175 1","pages":"Pages 37-58"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-5088(91)90348-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71731598","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}

{"title":"Magnetic structures of TbMn6Sn6 and HoMn6Sn6 compounds from neutron diffraction study","authors":"B.Chafik El Idrissi, G. Venturini, B. Malaman, D. Fruchart","doi":"10.1016/0022-5088(91)90359-C","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90359-C","url":null,"abstract":"","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"8 1","pages":"143-154"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79200844","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}

{"title":"Influence of adsorption and interfacial reactions induced by chromium and titanium on the wettability of vitreous carbon by NiPd brazing alloys","authors":"P. Kritsalis, L. Coudurier, C. Parayre, N. Eustathopoulos","doi":"10.1016/0022-5088(91)90346-6","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90346-6","url":null,"abstract":"","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"62 1","pages":"13-27"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79314329","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}

{"title":"The crystal structure of the low temperature form of Co2As","authors":"Ingrid Lindeberg, Y. Andersson","doi":"10.1016/0022-5088(91)90361-7","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90361-7","url":null,"abstract":"","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"109 1","pages":"163-169"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82500733","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}

{"title":"SiS2-isostrukturelle Anionen [SiP22−], [GeAs22−] und [SnAs22−] in Alkaliverbindungen","authors":"Brigitte Eisenmann,&nbsp;Jürgen Klein","doi":"10.1016/0022-5088(91)90355-8","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90355-8","url":null,"abstract":"<div><p>K₂[GeAs₂], Rb₂[SnAs₂], Cs₂[SiP₂], Cs₂[SiAs₂] and Cs₂[SnAs₂] were prepared from molten mixtures of the elements under an argon atmosphere in Al₂O₃ crucibles. The compounds form needle-shaped crystals, which are sensitive to moisture. The structures are of the K₂[SiP₂] type and contain the polyanionic chains <span><math><msub><mi></mi><mn>∞</mn></msub><msup><mi></mi><mn>1</mn></msup><mtext>[SiP</mtext><msub><mi></mi><mn><mtext>4</mtext><mtext>2</mtext></mn></msub><msup><mi></mi><mn>2−</mn></msup><mtext>], </mtext><msub><mi></mi><mn>∞</mn></msub><msup><mi></mi><mn>1</mn></msup><mtext>[SiAs</mtext><msub><mi></mi><mn><mtext>4</mtext><mtext>2</mtext></mn></msub><msup><mi></mi><mn>2−</mn></msup><mtext>], </mtext><msub><mi></mi><mn>∞</mn></msub><msup><mi></mi><mn>1</mn></msup><mtext>[GeAs</mtext><msub><mi></mi><mn><mtext>4</mtext><mtext>2</mtext></mn></msub><msup><mi></mi><mn>2−</mn></msup><mtext>] and </mtext><msub><mi></mi><mn>∞</mn></msub><msup><mi></mi><mn>1</mn></msup><mtext>[SnAs</mtext><msub><mi></mi><mn><mtext>4</mtext><mtext>2</mtext></mn></msub><msup><mi></mi><mn>2−</mn></msup><mtext>]</mtext></math></span> composed of edge-sharing tetrahedra, isoelectronic and isostructural with SiS₂. The structures were refined from X-ray single-crystal data: space group <em>Ibam</em> (No. 72), <em>Z</em> = 4. K₂[GeAs₂]: <em>a</em> = 1329.2(4) pm, <em>b</em> = 702.8(3) pm, <em>c</em> = 654.8(3) pm Rb₂[SnAs₂]: <em>a</em> = 1397.4(4) pm, <em>b</em> = 745.4(3) pm, <em>c</em> = 694.2(3) pm Cs₂[SiP₂]: <em>a</em> = 1412.7(4) pm, <em>b</em> = 746.2(3) pm, <em>c</em> = 619.6(3) pm Cs₂[SiAs₂]: <em>a</em> = 1442.5(4) pm, <em>b</em> = 757.1(3) pm, <em>c</em> = 642.0(3) pm Cs₂[SnAs₂]: <em>a</em> = 1465.7(4) pm, <em>b</em> = 773.3(3) pm, <em>c</em> = 695.3(3) pm</p></div>","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"175 1","pages":"Pages 109-117"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-5088(91)90355-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71731603","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}

{"title":"The ternary system Co-Ga-As at 800 °C","authors":"Ingrid Lindeberg, Y. Andersson","doi":"10.1016/0022-5088(91)90360-G","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90360-G","url":null,"abstract":"","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"80 1","pages":"155-162"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75302425","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}

{"title":"Demixing of U-Zr alloys under a thermal gradient","authors":"T. Ogawa, T. Iwai, M. Kurata","doi":"10.1016/0022-5088(91)90349-9","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90349-9","url":null,"abstract":"","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"4 1","pages":"59-69"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81492509","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}

{"title":"Mechanical alloying of the Pd-Si system in controlled conditions of energy transfer","authors":"F. Padella, E. Paradiso, N. Burgio, M. Magini, S. Martelli, W. Guo, A. Iasonna","doi":"10.1016/0022-5088(91)90351-4","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90351-4","url":null,"abstract":"","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"73 1","pages":"79-90"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90032526","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}

{"title":"Constitutional studies of molybdenum-palladium alloys using ultra-rapidly solidified samples","authors":"R. Gürler ,&nbsp;J.N. Pratt","doi":"10.1016/0022-5088(91)90350-D","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90350-D","url":null,"abstract":"<div><p>Phase relationships in the system Mo-Pd in the temperature range 880–1100°C were re-investigated using ultra-rapidly solidified samples. The finely divided microstructures produced using this technique were found to achieve equilibrium on annealing much more rapidly than conventionally prepared materials. Optical microscopy, X-ray diffraction methods and scanning and analytical electron microscopy were used for phase characterization. The solubility limits of the molybdenum-rich and palladium-rich terminal solid solutions were established. No intermediate phases were found at the temperatures investigated.</p></div>","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"175 1","pages":"Pages 71-78"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-5088(91)90350-D","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71731614","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}

{"title":"Investigations in the boron-carbon system with the aid of electron probe microanalysis","authors":"K. Schwetz, P. Karduck","doi":"10.1016/0022-5088(91)90345-5","DOIUrl":"https://doi.org/10.1016/0022-5088(91)90345-5","url":null,"abstract":"","PeriodicalId":17534,"journal":{"name":"Journal of The Less Common Metals","volume":"83 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"1991-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83762030","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}