介绍了一台“形状记忆合金差温循环试验装置”。该装置具有多种功能。适用于各种形状记忆合金及元件在冷热交替的两种温度下作往复循环处理。可作形状记忆效应冷热疲劳衰减的测定,亦可作双向形状记忆效应的训练。用本装置对 TiNi 基记...介绍了一台“形状记忆合金差温循环试验装置”。该装置具有多种功能。适用于各种形状记忆合金及元件在冷热交替的两种温度下作往复循环处理。可作形状记忆效应冷热疲劳衰减的测定,亦可作双向形状记忆效应的训练。用本装置对 TiNi 基记忆合金和铜基记忆合金弹簧进行了差温循环处理和记忆性能疲劳衰减的测定,得出了满意的结果。展开更多
The thermal oxidation behavior of a near equi atomic TiNi shape memory alloy was studied by the measurement of the weight gain of specimens in oxidation and the analysis of the oxide films with Auger Electron Spectr...The thermal oxidation behavior of a near equi atomic TiNi shape memory alloy was studied by the measurement of the weight gain of specimens in oxidation and the analysis of the oxide films with Auger Electron Spectrometry. It is found that the oxidation kinetics of the alloy follows logarithmic rate law at both 400℃ and 500℃, while it follows a near parabolic oxidation law at 600℃. All the oxide films formed on TiNi alloy are primarily titanium dioxide independent of the exposure temperature and time. It is shown from the experimental results that shape memory treatment of the alloy at around 500℃ normally results in the formation of a thin oxide film within a 300 nm thickness, which is effective in screening the nickel content of the bulk material from direct contact with the environment.展开更多
NiTi shape memory alloy (SMA) stent with film are the long-term implanted medical devices which could be used in human’s organ, such as esophagus, bile duct, urethra-prostate and blood vessel, by intervene therapy. I...NiTi shape memory alloy (SMA) stent with film are the long-term implanted medical devices which could be used in human’s organ, such as esophagus, bile duct, urethra-prostate and blood vessel, by intervene therapy. It is very important to have a good biocompatibility for implanted device. According to standard ISO 10993, we completed biocompatibility evaluation of NiTi stent that included following tests: cytotoxicity, sensitization, genotoxicity, hemolysis and acute systemic toxicity. The results of tests qualify the NiTi stent, and provide an optimistic conclusion for the eventual use of NiTi stent as implanted medical devices.展开更多
文摘介绍了一台“形状记忆合金差温循环试验装置”。该装置具有多种功能。适用于各种形状记忆合金及元件在冷热交替的两种温度下作往复循环处理。可作形状记忆效应冷热疲劳衰减的测定,亦可作双向形状记忆效应的训练。用本装置对 TiNi 基记忆合金和铜基记忆合金弹簧进行了差温循环处理和记忆性能疲劳衰减的测定,得出了满意的结果。
文摘The thermal oxidation behavior of a near equi atomic TiNi shape memory alloy was studied by the measurement of the weight gain of specimens in oxidation and the analysis of the oxide films with Auger Electron Spectrometry. It is found that the oxidation kinetics of the alloy follows logarithmic rate law at both 400℃ and 500℃, while it follows a near parabolic oxidation law at 600℃. All the oxide films formed on TiNi alloy are primarily titanium dioxide independent of the exposure temperature and time. It is shown from the experimental results that shape memory treatment of the alloy at around 500℃ normally results in the formation of a thin oxide film within a 300 nm thickness, which is effective in screening the nickel content of the bulk material from direct contact with the environment.
文摘NiTi shape memory alloy (SMA) stent with film are the long-term implanted medical devices which could be used in human’s organ, such as esophagus, bile duct, urethra-prostate and blood vessel, by intervene therapy. It is very important to have a good biocompatibility for implanted device. According to standard ISO 10993, we completed biocompatibility evaluation of NiTi stent that included following tests: cytotoxicity, sensitization, genotoxicity, hemolysis and acute systemic toxicity. The results of tests qualify the NiTi stent, and provide an optimistic conclusion for the eventual use of NiTi stent as implanted medical devices.
