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Analysis of the essential oils of pine cones of pinus koraiensis steb. et zucc. and P. sylvestris L. from China / Yang, X. in The journal of essential oil research, Vol. 22 N° 5 (Septembre/Octobre 2010) 

Public ISBD [article]  in The journal of essential oil research > Vol. 22 N° 5 (Septembre/Octobre 2010) . - pp. 446-448 Titre : Analysis of the essential oils of pine cones of pinus koraiensis steb. et zucc. and P. sylvestris L. from China Type de document : texte imprimé Auteurs : Yang, X., Auteur ; H. Zhang, Auteur ; Y. Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 446-448 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Pinus  koraiensis  Pinus  sylvestris  Pinaceae  Essential  oil  composition  α-pinene  Limonene  Aaromadendrene  α-longipinene Index. décimale : 646 Résumé : The chemical composition of the essential oil obtained from pine cones of Pinus koraiensis and Pinus sylvestris from northeast China was analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS), and 35 and 31 components were identified, respectively. α-pinene (35.2%), limonene (18.4%), β-pinene (8.7%), β-caryophyllene (3.5%) and myrcene (3.0%) were the main components in P. koraiensis cone oil. Aromadendrene (20.2%), α-pinene (18.5%), α-longipinene (10.5%) and α-terpineol (5.5%) were the main components in P. sylvestris cone oil. The antioxidant activity of the oils from P. koraiensis and P. sylvestris was evaluated using the DPPH. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700368 [article] Analysis of the essential oils of pine cones of pinus koraiensis steb. et zucc. and P. sylvestris L. from China [texte imprimé] / Yang, X., Auteur ; H. Zhang, Auteur ; Y. Zhang, Auteur . - 2011 . - pp. 446-448. Génie Chimique Langues : Anglais (eng) in The journal of essential oil research > Vol. 22 N° 5 (Septembre/Octobre 2010) . - pp. 446-448 Mots-clés : Pinus  koraiensis  Pinus  sylvestris  Pinaceae  Essential  oil  composition  α-pinene  Limonene  Aaromadendrene  α-longipinene Index. décimale : 646 Résumé : The chemical composition of the essential oil obtained from pine cones of Pinus koraiensis and Pinus sylvestris from northeast China was analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC/MS), and 35 and 31 components were identified, respectively. α-pinene (35.2%), limonene (18.4%), β-pinene (8.7%), β-caryophyllene (3.5%) and myrcene (3.0%) were the main components in P. koraiensis cone oil. Aromadendrene (20.2%), α-pinene (18.5%), α-longipinene (10.5%) and α-terpineol (5.5%) were the main components in P. sylvestris cone oil. The antioxidant activity of the oils from P. koraiensis and P. sylvestris was evaluated using the DPPH. DEWEY : 665 ISSN : 1041-2905 En ligne : http://www.tandfonline.com/doi/abs/10.1080/10412905.2010.9700368

Fracture of concrete structure using simplified meshless method / Y. Dong in Cement and concrete research, Vol. 39 N° 10 (Octobre 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 966–972 Titre : Fracture of concrete structure using simplified meshless method Type de document : texte imprimé Auteurs : Y. Dong, Auteur ; S. Fang, Auteur ; Y. Zhang, Auteur Année de publication : 2009 Article en page(s) : pp. 966–972 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Computational  mechanics;  Crack;  racture;  Meshless;  EFG;  Material  failure;  Concrete;  Enrichment;  Partition  of  unity Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : Numerical analysis of fracture in concrete is studied with a simplified meshless method. In this meshless method, the crack is represented by a set of disconnected cohesive crack segments that are required to pass through meshless nodes. The crack method therefore falls in the category of discrete crack methods. However, in contrast to most other methods where the crack is represented as continuous line/surface, no representation of the crack surface is needed. Hence, there is no need to track the crack path. Branching cracks and coalescing cracks are a natural outcome of the analysis and no specific algorithms need to be incorporated to model such complicated events. Besides the simplicity of the method, the accuracy is maintained. This is demonstrated through several examples. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001458 [article] Fracture of concrete structure using simplified meshless method [texte imprimé] / Y. Dong, Auteur ; S. Fang, Auteur ; Y. Zhang, Auteur . - 2009 . - pp. 966–972. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 10 (Octobre 2009) . - pp. 966–972 Mots-clés : Computational  mechanics;  Crack;  racture;  Meshless;  EFG;  Material  failure;  Concrete;  Enrichment;  Partition  of  unity Index. décimale : 691 Matériaux de construction. Pièces et parties composantes Résumé : Numerical analysis of fracture in concrete is studied with a simplified meshless method. In this meshless method, the crack is represented by a set of disconnected cohesive crack segments that are required to pass through meshless nodes. The crack method therefore falls in the category of discrete crack methods. However, in contrast to most other methods where the crack is represented as continuous line/surface, no representation of the crack surface is needed. Hence, there is no need to track the crack path. Branching cracks and coalescing cracks are a natural outcome of the analysis and no specific algorithms need to be incorporated to model such complicated events. Besides the simplicity of the method, the accuracy is maintained. This is demonstrated through several examples. DEWEY : 620.13 ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609001458

Interdiffusion behavior of Al-rich oxidation resistant coatings on ferritic–martensitic alloys / S. Velraj in Materials and corrosion, Vol. 63 N° 10 (Octobre 2012) 

Public ISBD [article]  in Materials and corrosion > Vol. 63 N° 10 (Octobre 2012) . - pp. 909–920 Titre : Interdiffusion behavior of Al-rich oxidation resistant coatings on ferritic–martensitic alloys Type de document : texte imprimé Auteurs : S. Velraj, Auteur ; Y. Zhang, Auteur ; E. W. Hawkins, Auteur Année de publication : 2013 Article en page(s) : pp. 909–920 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Al-rich  coatings;  aluminide  coatings;  chemical  vapor  deposition;  COSIM;  diffusion;  ferritic–martensitic  alloy;  oxidation;  pack  cementation;  water  vapor Résumé : Interdiffusion of thin Al-rich coatings synthesized by chemical vapor deposition (CVD) and pack cementation on 9Cr ferritic–martensitic alloys was investigated in the temperature range of 650–700 °C. The compositional changes after long-term exposures in laboratory air and air + 10 vol% H2O were examined experimentally. Interdiffusion was modeled by a modified coating oxidation and substrate interdiffusion model (COSIM) program. The modification enabled the program to directly input the concentration profiles of the as-deposited coating determined by electron probe microanalysis (EPMA). Reasonable agreement was achieved between the simulated and experimental Al profiles after exposures. The model was also applied to predict coating lifetime at 650–700 °C based on a minimum Al content (Cb) required at the coating surface to re-form protective oxide scale. In addition to a Cb value established from the failure of a thin CVD coating at 700 °C, values reported for slurry aluminide coatings were also included in lifetime predictions. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201206641/abstract [article] Interdiffusion behavior of Al-rich oxidation resistant coatings on ferritic–martensitic alloys [texte imprimé] / S. Velraj, Auteur ; Y. Zhang, Auteur ; E. W. Hawkins, Auteur . - 2013 . - pp. 909–920. Génie mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 63 N° 10 (Octobre 2012) . - pp. 909–920 Mots-clés : Al-rich  coatings;  aluminide  coatings;  chemical  vapor  deposition;  COSIM;  diffusion;  ferritic–martensitic  alloy;  oxidation;  pack  cementation;  water  vapor Résumé : Interdiffusion of thin Al-rich coatings synthesized by chemical vapor deposition (CVD) and pack cementation on 9Cr ferritic–martensitic alloys was investigated in the temperature range of 650–700 °C. The compositional changes after long-term exposures in laboratory air and air + 10 vol% H2O were examined experimentally. Interdiffusion was modeled by a modified coating oxidation and substrate interdiffusion model (COSIM) program. The modification enabled the program to directly input the concentration profiles of the as-deposited coating determined by electron probe microanalysis (EPMA). Reasonable agreement was achieved between the simulated and experimental Al profiles after exposures. The model was also applied to predict coating lifetime at 650–700 °C based on a minimum Al content (Cb) required at the coating surface to re-form protective oxide scale. In addition to a Cb value established from the failure of a thin CVD coating at 700 °C, values reported for slurry aluminide coatings were also included in lifetime predictions. En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201206641/abstract

Performance of Al-rich oxidation resistant coatings for Fe-base alloys / B. A. Pint in Materials and corrosion, Vol. 62 N° 6 (Juin 2011) 

Public ISBD [article]  in Materials and corrosion > Vol. 62 N° 6 (Juin 2011) . - pp. 549–560 Titre : Performance of Al-rich oxidation resistant coatings for Fe-base alloys Type de document : texte imprimé Auteurs : B. A. Pint, Auteur ; Y. Zhang, Auteur Année de publication : 2011 Article en page(s) : pp. 549–560 Note générale : Génie Mécanique Langues : Anglais (eng) Mots-clés : Coating  Ferritic  alloys  Austenitic  alloys  H2O  effect  Interdiffusion  Lifetime  model Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The oxidation resistance of Al-rich coatings made by chemical vapor deposition and pack cementation was examined on representative ferritic-martensitic (FM, e.g. Grade 91, Fe-9Cr-1Mo) and austenitic steel substrates at 650°-800 °C. To evaluate the potential benefits and problems with these alumina-forming coatings, oxidation exposures were conducted in a humid air environment where the uncoated substrates experience rapid oxidation, similar to steam. Exposure temperatures were increased to accelerate failure by oxidation and interdiffusion of Al into the substrate. The difference in the coefficient of thermal expansion (CTE) between coating and substrate was found to cause cracking and coating failure during rapid thermal cycling on thicker coatings with Fe-Al intermetallic phases. Therefore, thinner coatings with less Al and a ferritic Fe(Al) structure were evaluated more extensively and tested to failure at 700° and 800 °C on FM steels. The remaining Al content at failure was measured and used to improve a previously developed coating lifetime model. At 700° and 800 °C, thin coated austenitic specimens continue to exhibit protective behavior at more than double the lifetime of a similar coating on FM steel. The longer lifetime was attributed to the ferritic coating-austenitic substrate phase boundary inhibiting Al interdiffusion. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005884/abstract [article] Performance of Al-rich oxidation resistant coatings for Fe-base alloys [texte imprimé] / B. A. Pint, Auteur ; Y. Zhang, Auteur . - 2011 . - pp. 549–560. Génie Mécanique Langues : Anglais (eng) in Materials and corrosion > Vol. 62 N° 6 (Juin 2011) . - pp. 549–560 Mots-clés : Coating  Ferritic  alloys  Austenitic  alloys  H2O  effect  Interdiffusion  Lifetime  model Index. décimale : 620.1 Essais des matériaux. Défauts des matériaux. Protection des matériaux Résumé : The oxidation resistance of Al-rich coatings made by chemical vapor deposition and pack cementation was examined on representative ferritic-martensitic (FM, e.g. Grade 91, Fe-9Cr-1Mo) and austenitic steel substrates at 650°-800 °C. To evaluate the potential benefits and problems with these alumina-forming coatings, oxidation exposures were conducted in a humid air environment where the uncoated substrates experience rapid oxidation, similar to steam. Exposure temperatures were increased to accelerate failure by oxidation and interdiffusion of Al into the substrate. The difference in the coefficient of thermal expansion (CTE) between coating and substrate was found to cause cracking and coating failure during rapid thermal cycling on thicker coatings with Fe-Al intermetallic phases. Therefore, thinner coatings with less Al and a ferritic Fe(Al) structure were evaluated more extensively and tested to failure at 700° and 800 °C on FM steels. The remaining Al content at failure was measured and used to improve a previously developed coating lifetime model. At 700° and 800 °C, thin coated austenitic specimens continue to exhibit protective behavior at more than double the lifetime of a similar coating on FM steel. The longer lifetime was attributed to the ferritic coating-austenitic substrate phase boundary inhibiting Al interdiffusion. DEWEY : 620.1 ISSN : 0947-5117 En ligne : http://onlinelibrary.wiley.com/doi/10.1002/maco.201005884/abstract