Volume 0,Issue 4,1991 Table of Contents
1991(4).
Abstract:
Study on the development of Nd-Fe-B permanent-magnet material and its major applications are presented in this paper.
Study on the development of Nd-Fe-B permanent-magnet material and its major applications are presented in this paper.
1991(4):3-14.
Abstract:
In this paper, the development of TiAl ordered alloys is briefly introduced. The research work carried on both at home and abroad to overcome their brittleness at room temperature and poor formability is systematically reviewed. The future tendency for ordered TiAl is outlined finally
In this paper, the development of TiAl ordered alloys is briefly introduced. The research work carried on both at home and abroad to overcome their brittleness at room temperature and poor formability is systematically reviewed. The future tendency for ordered TiAl is outlined finally
1991(4):15-25.
Abstract:
The Current status of physical property testing techniques for metals in China is described in this paper. Referring to the requirements of material development and the tendency of physical property testing abroad, the author has discussed the main trend in this area in China.
The Current status of physical property testing techniques for metals in China is described in this paper. Referring to the requirements of material development and the tendency of physical property testing abroad, the author has discussed the main trend in this area in China.
1991(4):26-30.
Abstract:
The definition and the meaning of microstructure and magnetic properties of rare-earth permanent magnet materials are demonstrated. Based on the nucleation behaviour and the propagation behaviour of the reversed domain walls during magnetization reversal, the current status of the interrelatic between microstructure and magnetic properties are briefly reviewed. For a better understanding of (?) interrelation, it is suggested that the numerical simulation method should be applied to study (?) magnetization reversal process.
The definition and the meaning of microstructure and magnetic properties of rare-earth permanent magnet materials are demonstrated. Based on the nucleation behaviour and the propagation behaviour of the reversed domain walls during magnetization reversal, the current status of the interrelatic between microstructure and magnetic properties are briefly reviewed. For a better understanding of (?) interrelation, it is suggested that the numerical simulation method should be applied to study (?) magnetization reversal process.
1991(4):31-35.
Abstract:
采用TEM、SEM、X射线衍射、显微硬度测盛等方法,研究了混合稀土对6063合金阳极氧化膜结构和某些性能的影响。实验结果表明:当合金成分和生产工艺合理、稀土含最适当(0.2wt%左右)时,加入混合稀土能使6063合金阳极氧化膜更加致密、光洁,密度增大,显微硬度值提高。
采用TEM、SEM、X射线衍射、显微硬度测盛等方法,研究了混合稀土对6063合金阳极氧化膜结构和某些性能的影响。实验结果表明:当合金成分和生产工艺合理、稀土含最适当(0.2wt%左右)时,加入混合稀土能使6063合金阳极氧化膜更加致密、光洁,密度增大,显微硬度值提高。
1991(4):36-45.
Abstract:
The effect of the rolling technique of Ti/Al clad sheet on the bonding strength of it after rolling and the morphology of the peeled surface is investigated The results show that the deformation extent of Ti is a dominant factor for bonding strength and morphology of the peeled surface. Aluminium temperature in rolling process also has an important impact on bonding. It is found that three bonding mechanisms coexist during the process.
The effect of the rolling technique of Ti/Al clad sheet on the bonding strength of it after rolling and the morphology of the peeled surface is investigated The results show that the deformation extent of Ti is a dominant factor for bonding strength and morphology of the peeled surface. Aluminium temperature in rolling process also has an important impact on bonding. It is found that three bonding mechanisms coexist during the process.
1991(4):46-51.
Abstract:
报道了采用熔融慢冷工艺制备具有织构生长的YBCO体材的方法。较详细地阐述了粉末烧结YBCO坯料在1100℃下的熔融分解和随后通过包晶反应温度及附近温区的缓慢冷却速度对织构生长的影响,还报道了采用熔融慢冷工艺制备的YBCO体材的临界电流密度。结果表明,熔融慢冷工艺是一种制备具有高J_c值的YBCO体材的有效方法,采用这种工艺方法已获得临界电流密度达63405A/cm~2(77K,1T。H∥ab面)的YBCO体材样品。
报道了采用熔融慢冷工艺制备具有织构生长的YBCO体材的方法。较详细地阐述了粉末烧结YBCO坯料在1100℃下的熔融分解和随后通过包晶反应温度及附近温区的缓慢冷却速度对织构生长的影响,还报道了采用熔融慢冷工艺制备的YBCO体材的临界电流密度。结果表明,熔融慢冷工艺是一种制备具有高J_c值的YBCO体材的有效方法,采用这种工艺方法已获得临界电流密度达63405A/cm~2(77K,1T。H∥ab面)的YBCO体材样品。
1991(4):52-55.
Abstract:
The application of computer simulation technique in reaction sintening of silicon nitride ceramics is demonstrated by study the effect of computer simulated partical shapes and sizes of the ultrafine silicon powder on the coordination numbers of the partical is powder compact.
The application of computer simulation technique in reaction sintening of silicon nitride ceramics is demonstrated by study the effect of computer simulated partical shapes and sizes of the ultrafine silicon powder on the coordination numbers of the partical is powder compact.
1991(4):56-60.
Abstract:
Through the experiment of preparing stainless steel porous filter by sintering compacted water atomized 0Cr18Ni9 powder in vacuum or pure hydrogen, an empirical formular for the relation between average partical size of the powder and maximum pore size in bubble test is suggested. The effects of different partical size forming pressure and addictives on the porosity, maximum pore size, relative permeability coefficient and tensite strength of the porous stainless steel filter are investegated. The developed filter rings have been put into batch production and obvious economical benefits have been achieved.
Through the experiment of preparing stainless steel porous filter by sintering compacted water atomized 0Cr18Ni9 powder in vacuum or pure hydrogen, an empirical formular for the relation between average partical size of the powder and maximum pore size in bubble test is suggested. The effects of different partical size forming pressure and addictives on the porosity, maximum pore size, relative permeability coefficient and tensite strength of the porous stainless steel filter are investegated. The developed filter rings have been put into batch production and obvious economical benefits have been achieved.
1991(4):61-64.
Abstract:
Anodes for cathodic protection are divided into sacrifical anodes and impressed current anodes. This peper recommendes mainlg on impressed current anode materials and anode reactions in cathodic protection, Alsothrough comparison of the characteristics of graphite, silicon-chromium-iron, p latinized Ti/Nb, mixed metal oxides are hopeful anode materials for impressed current cathodic protection.
Anodes for cathodic protection are divided into sacrifical anodes and impressed current anodes. This peper recommendes mainlg on impressed current anode materials and anode reactions in cathodic protection, Alsothrough comparison of the characteristics of graphite, silicon-chromium-iron, p latinized Ti/Nb, mixed metal oxides are hopeful anode materials for impressed current cathodic protection.
1991(4):65-69.
Abstract:
本试验研究了钨与硫氰酸盐生成有色配合物的条件,制订了测定锆及锆合金中杂质钨的方法。在H_2SO_4-HCl介质中用氯化亚锡加热处理还原钨到五价,加入KCNS显色,在400nm波长处测量吸光度以测定钨。本方法适用于锆及其合金中0.002%以上钨的测定。其加料回收率在95%—105%。样品测定结果重现性好,变异系数不大于4%。
本试验研究了钨与硫氰酸盐生成有色配合物的条件,制订了测定锆及锆合金中杂质钨的方法。在H_2SO_4-HCl介质中用氯化亚锡加热处理还原钨到五价,加入KCNS显色,在400nm波长处测量吸光度以测定钨。本方法适用于锆及其合金中0.002%以上钨的测定。其加料回收率在95%—105%。样品测定结果重现性好,变异系数不大于4%。
1991(4):73-76.
Abstract:
The structure and specifications for agitator made of Mo alloy clad with Pt Rh, as well as the fabrication process and the reward of using the products are presented. The result reveals that home-made aginators are competitive with Japanese ones.
The structure and specifications for agitator made of Mo alloy clad with Pt Rh, as well as the fabrication process and the reward of using the products are presented. The result reveals that home-made aginators are competitive with Japanese ones.
1991(4):77-80.
Abstract:
Applications of Ti materials in vacuum salt refining and salt chemical industries. as well as obtained economical and social benefits are persented in this paper.
Applications of Ti materials in vacuum salt refining and salt chemical industries. as well as obtained economical and social benefits are persented in this paper.
