The high corrosion sensitivity and the potential bio-toxicity of Mg-Ag alloys limit their wide applications for the production of implanted devices. In the present work, Mn is added into the Mg-Ag alloy to optimize it...The high corrosion sensitivity and the potential bio-toxicity of Mg-Ag alloys limit their wide applications for the production of implanted devices. In the present work, Mn is added into the Mg-Ag alloy to optimize its corrosion behaviour. The corrosion behaviour of Mg-Ag-Mn alloys is investigated with the underlying microstructural factors examined. The Mg-Ag alloy with 2 wt% Mn exhibits the highest corrosion resistance after post-casting heat treatment at 440 ℃. The addition of Mn results in α-Mn phase with the incorporation of Fe, which suppresses the cathodic activity of impurity Fe. Further, heat treatment of the cast alloys homogenizes the distribution of Ag and promotes the precipitation of α-Mn phase. The former removes Ag segregations as potential cathodes;the latter promotes a more uniform distribution of cathodes and, therefore, prevents localized corrosion.展开更多
In recent years,with the rapid development of modern social economy,the urbanization process has continued to grow,and with it,so as to the demand for housing construction in urban areas.From the development perspecti...In recent years,with the rapid development of modern social economy,the urbanization process has continued to grow,and with it,so as to the demand for housing construction in urban areas.From the development perspective of construction projects,the construction involved would not only has to have a strong structural quality,but attention is also needed in the overall quality of the building.In this,a reasonable introduction of post-pouring belt construction technology in the building construction process can effectively control cracks in concrete structures.This article takes the post-pouring belt construction technology as the main research object and focuses on its application in the housing construction process,which has shown to provide better assistance in aiding construction.展开更多
With the rapid development of the construction industry in China, new construction technology measures are increasingly applied to solve the problems encountered in the construction process. In the process of foundati...With the rapid development of the construction industry in China, new construction technology measures are increasingly applied to solve the problems encountered in the construction process. In the process of foundation construction, more and more shrinkage-compensating concrete is poured into the pre-set post-cast strip on the building structure to shorten or cancel the length of post-cast strip and expansion joint. After many practical projects, it is not difficult to find that the continuity of the construction process can be effectively guaranteed by setting expansion reinforcing belts. After the completion of the construction, the continuity and durability of the concrete are effectively controlled, the cracking problem in the design and construction process is solved, the construction period is greatly shortened, and remarkable economic benefits are obtained.展开更多
基金supported by the National Natural Science Foundation of China(Nos.52001128 and 52371065)the Hubei Provincial Natural Science Foundation of China(No.2023AFB637).
文摘The high corrosion sensitivity and the potential bio-toxicity of Mg-Ag alloys limit their wide applications for the production of implanted devices. In the present work, Mn is added into the Mg-Ag alloy to optimize its corrosion behaviour. The corrosion behaviour of Mg-Ag-Mn alloys is investigated with the underlying microstructural factors examined. The Mg-Ag alloy with 2 wt% Mn exhibits the highest corrosion resistance after post-casting heat treatment at 440 ℃. The addition of Mn results in α-Mn phase with the incorporation of Fe, which suppresses the cathodic activity of impurity Fe. Further, heat treatment of the cast alloys homogenizes the distribution of Ag and promotes the precipitation of α-Mn phase. The former removes Ag segregations as potential cathodes;the latter promotes a more uniform distribution of cathodes and, therefore, prevents localized corrosion.
文摘In recent years,with the rapid development of modern social economy,the urbanization process has continued to grow,and with it,so as to the demand for housing construction in urban areas.From the development perspective of construction projects,the construction involved would not only has to have a strong structural quality,but attention is also needed in the overall quality of the building.In this,a reasonable introduction of post-pouring belt construction technology in the building construction process can effectively control cracks in concrete structures.This article takes the post-pouring belt construction technology as the main research object and focuses on its application in the housing construction process,which has shown to provide better assistance in aiding construction.
文摘With the rapid development of the construction industry in China, new construction technology measures are increasingly applied to solve the problems encountered in the construction process. In the process of foundation construction, more and more shrinkage-compensating concrete is poured into the pre-set post-cast strip on the building structure to shorten or cancel the length of post-cast strip and expansion joint. After many practical projects, it is not difficult to find that the continuity of the construction process can be effectively guaranteed by setting expansion reinforcing belts. After the completion of the construction, the continuity and durability of the concrete are effectively controlled, the cracking problem in the design and construction process is solved, the construction period is greatly shortened, and remarkable economic benefits are obtained.
