The as-spun Ti_(1−x)La_(x)Fe_(0.8)Mn_(0.2)(x=0,0.01,0.03,0.06,0.09,molar fraction)alloys were prepared by melt spinning.The effects of La substitution for Ti on the microstructure,hydrogen storage kinetics and thermod...The as-spun Ti_(1−x)La_(x)Fe_(0.8)Mn_(0.2)(x=0,0.01,0.03,0.06,0.09,molar fraction)alloys were prepared by melt spinning.The effects of La substitution for Ti on the microstructure,hydrogen storage kinetics and thermodynamics of TiFe-type Ti−Fe−Mn-based alloy were investigated.The as-spun alloys hold the TiFe single phase,which transforms to TiFeH_(0.06),TiFeH,and TiFeH_(2) hydrides after hydrogenation.La substitution promotes the formation of micro-defects(such as dislocations and grain boundaries)in the alloys,thus facilitating hydrogen diffusion.In addition,the hydrogen storage kinetics properties are improved after introducing La element.With the rise of La content,the hydrogen storage capacity decreases firstly and then increases,but the absolute value of hydriding enthalpy change(|ΔH|)increases firstly and then reduces.When x=0.01,the maximum value of|ΔH|is obtained to be(25.23±0.50)kJ/mol for hydriding,and the alloy has the maximum hydrogen absorption capacity of(1.80±0.04)wt.%under the conditions of 323 K and 3 MPa.展开更多
After the 2008 financial crisis, reality prompts people to reflect on the traditional theoretical frameworks of economics and the practical experiences based on macro-control and "demand management." The new...After the 2008 financial crisis, reality prompts people to reflect on the traditional theoretical frameworks of economics and the practical experiences based on macro-control and "demand management." The new reality also stimulates innovative efforts to "connect theory with practice" and leads academia and decision-makers to pay unprecedented attention to "supply management" regulation and structural supply-side reforms. Based on the theoretical innovation of the "new supply-side economics," this paper systematically discusses China's supply-side reform and its related issues from four levels—the innovation of closely connecting theory with practice, the problem-oriented innovation of re-making the momentum system under the new normal, the innovation for overall and long-term goals based on comprehensive planning and systematic engineering, and the innovation of institutional supply centered on reforms and modernization.展开更多
基金financial supports from the Inner Mongolia Natural Science Foundation,China (No.2019BS05005)the Inner Mongolia University of Science and Technology Innovation Fund,China (No.2019QDL-B11)the National Natural Science Foundation of China (Nos.51901105, 51871125, 51761032).
文摘The as-spun Ti_(1−x)La_(x)Fe_(0.8)Mn_(0.2)(x=0,0.01,0.03,0.06,0.09,molar fraction)alloys were prepared by melt spinning.The effects of La substitution for Ti on the microstructure,hydrogen storage kinetics and thermodynamics of TiFe-type Ti−Fe−Mn-based alloy were investigated.The as-spun alloys hold the TiFe single phase,which transforms to TiFeH_(0.06),TiFeH,and TiFeH_(2) hydrides after hydrogenation.La substitution promotes the formation of micro-defects(such as dislocations and grain boundaries)in the alloys,thus facilitating hydrogen diffusion.In addition,the hydrogen storage kinetics properties are improved after introducing La element.With the rise of La content,the hydrogen storage capacity decreases firstly and then increases,but the absolute value of hydriding enthalpy change(|ΔH|)increases firstly and then reduces.When x=0.01,the maximum value of|ΔH|is obtained to be(25.23±0.50)kJ/mol for hydriding,and the alloy has the maximum hydrogen absorption capacity of(1.80±0.04)wt.%under the conditions of 323 K and 3 MPa.
文摘After the 2008 financial crisis, reality prompts people to reflect on the traditional theoretical frameworks of economics and the practical experiences based on macro-control and "demand management." The new reality also stimulates innovative efforts to "connect theory with practice" and leads academia and decision-makers to pay unprecedented attention to "supply management" regulation and structural supply-side reforms. Based on the theoretical innovation of the "new supply-side economics," this paper systematically discusses China's supply-side reform and its related issues from four levels—the innovation of closely connecting theory with practice, the problem-oriented innovation of re-making the momentum system under the new normal, the innovation for overall and long-term goals based on comprehensive planning and systematic engineering, and the innovation of institutional supply centered on reforms and modernization.
