Isothermal sections of the Co−Al−Re ternary system at 1100 and 1300℃ were determined experimentally by electron probe microanalysis and X-ray diffraction.The results show that there are seven three-phase regions in t...Isothermal sections of the Co−Al−Re ternary system at 1100 and 1300℃ were determined experimentally by electron probe microanalysis and X-ray diffraction.The results show that there are seven three-phase regions in the 1100℃ isothermal section and five three-phase regions in the 1300℃ isothermal section.The solid solubilities ofαCo,εRe and CoAl increase a little with temperature increasing from 1100 to 1300℃.The solubility of Co in compounds AlRe2,Al11Re4 and Al4Re is negligible,<1.5 at.%.And no ternary compounds are found.展开更多
Objective: To understand the health status of transitional resettlement sites and the needs of residents on health education, and to pro-vide basis for conducting health education after ear- thquakes and other public ...Objective: To understand the health status of transitional resettlement sites and the needs of residents on health education, and to pro-vide basis for conducting health education after ear- thquakes and other public emergen-cies. Method: From May 31 to June 2, 2008 (19 to 21 days after the earthquake), field obser-vation, questionnaire survey, and structured interviews were conducted in five transitional resettlement sites. Information on health status, health service, health education, and residents’ needs on health education was col-lected. Results: 430 questionnaires were dis-tributed and 424 valid completed ones were returned. Food and water were adequately supplied. Clinics for health assistance were established and environment disinfecting was conducted regularly by public health profes-sionals. Health education was available to residents. The large proportion (98.6%, 97.9%, 88.7%, and 93.2% respectively) of the residents acknowledged that water supply, food supply, lavatories, and health service were adequate to fulfill basic needs. The overall disease in-cidence of surveyed residents was 44.8%, and diarrhea and fever with respiratory symptoms were the most common diseases. Among residents’ needs on disease prevention knowl-edge and skills, basic knowledge of infectious diseases was most desirable (49.8%), and safety knowledge of water uses was secon-darily most desirable (36.8%). The most fa-vored approach of obtaining knowledge was watching television. Conclusions: In the pe-riod of 20 days after the earthquake, Living security, health facilities, and health care ser-vice could satisfy residents’ basic needs. Post-disaster health education should con-centrate on basic knowledge and skills of communicable diseases and health- risky be-havior. Timely distributing disease prevention materials could be effective.展开更多
The phase equilibria in the Co-Ti-Re ternary system at 800,1000,1100 and 12000C were studied combined with electron probe microanalyzer(EPMA),X-ray diffraction(XRD),scanning electron microscope(SEM)and transmission el...The phase equilibria in the Co-Ti-Re ternary system at 800,1000,1100 and 12000C were studied combined with electron probe microanalyzer(EPMA),X-ray diffraction(XRD),scanning electron microscope(SEM)and transmission electron microscope(TEM).The new phaseτwith a large solubility was discovered at all four isothermal sections,and its structure still needs a further study.A large solubility of Re in the CoTi phase was observed.The solubility of Re in the Co_(3)Ti phase is6.1%at 800℃,8.7%at 1000℃and 7.7%at 1100℃.The present work could be significant for alloy design of Co-based alloys and thermodynamic analysis of the Co-TiRe ternary system.展开更多
基金financial supports from the National Natural Science Foundation of China(No.51831007)the National Key Research&Development Program of China(No.2017YFB0702901)。
文摘Isothermal sections of the Co−Al−Re ternary system at 1100 and 1300℃ were determined experimentally by electron probe microanalysis and X-ray diffraction.The results show that there are seven three-phase regions in the 1100℃ isothermal section and five three-phase regions in the 1300℃ isothermal section.The solid solubilities ofαCo,εRe and CoAl increase a little with temperature increasing from 1100 to 1300℃.The solubility of Co in compounds AlRe2,Al11Re4 and Al4Re is negligible,<1.5 at.%.And no ternary compounds are found.
文摘Objective: To understand the health status of transitional resettlement sites and the needs of residents on health education, and to pro-vide basis for conducting health education after ear- thquakes and other public emergen-cies. Method: From May 31 to June 2, 2008 (19 to 21 days after the earthquake), field obser-vation, questionnaire survey, and structured interviews were conducted in five transitional resettlement sites. Information on health status, health service, health education, and residents’ needs on health education was col-lected. Results: 430 questionnaires were dis-tributed and 424 valid completed ones were returned. Food and water were adequately supplied. Clinics for health assistance were established and environment disinfecting was conducted regularly by public health profes-sionals. Health education was available to residents. The large proportion (98.6%, 97.9%, 88.7%, and 93.2% respectively) of the residents acknowledged that water supply, food supply, lavatories, and health service were adequate to fulfill basic needs. The overall disease in-cidence of surveyed residents was 44.8%, and diarrhea and fever with respiratory symptoms were the most common diseases. Among residents’ needs on disease prevention knowl-edge and skills, basic knowledge of infectious diseases was most desirable (49.8%), and safety knowledge of water uses was secon-darily most desirable (36.8%). The most fa-vored approach of obtaining knowledge was watching television. Conclusions: In the pe-riod of 20 days after the earthquake, Living security, health facilities, and health care ser-vice could satisfy residents’ basic needs. Post-disaster health education should con-centrate on basic knowledge and skills of communicable diseases and health- risky be-havior. Timely distributing disease prevention materials could be effective.
基金financially supported by the National Natural Science Foundation of China(No.51831007)the Key-area Research and Development Program of Guangdong Province(No.2019B010943001)。
文摘The phase equilibria in the Co-Ti-Re ternary system at 800,1000,1100 and 12000C were studied combined with electron probe microanalyzer(EPMA),X-ray diffraction(XRD),scanning electron microscope(SEM)and transmission electron microscope(TEM).The new phaseτwith a large solubility was discovered at all four isothermal sections,and its structure still needs a further study.A large solubility of Re in the CoTi phase was observed.The solubility of Re in the Co_(3)Ti phase is6.1%at 800℃,8.7%at 1000℃and 7.7%at 1100℃.The present work could be significant for alloy design of Co-based alloys and thermodynamic analysis of the Co-TiRe ternary system.
