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| 1 | Ti_(2)AlNb合金与TC4合金真空扩散连接显示文摘采用真空扩散焊方法连接Ti_(2)AlNb合金与TC4合金,并研究连接参数与接头显微组织、力学性能之间的关系。结果表明,由于Al、Ti、Nb和V的扩散,界面处生成3种反应层,分别是TC4一侧的B2/β层和ɑ_(2)层以及Ti_(2)AlNb侧的ɑ_(2)+B2/β层。连接温度决定接头中的原子活性,因此,控制着反应层的形成和接头的抗剪切强度。当连接温度为950℃、保温时间为30 min和连接压力为10 MPa时,接头的抗剪切强度达到最高,为467 MPa。断口形貌的分析结果表明,断裂主要发生在B2/β层,接头的断裂模式为韧性断裂。同时,对接头的形成机理进行系统深入的讨论。 | 冯广杰 魏岩 胡丙旭 王义峰 邓德安 杨秀霞 | 2021 | Transactions of Nonferrous Metals Society of China2021，31，9： | 4 |
| 2 | 容器内自蔓延高温合成固化过程的热力学数值模拟显示文摘自蔓延高温合成固化是一种利用氧化还原反应放热处理高放废物煅烧灰、污染土壤等固体放射性废物的方法,在密封容器内对放射性废物采用自蔓延高温合成固化技术可有效提高产物的致密度并控制有害气溶胶的扩散。通过分析自蔓延化学反应机理和过程,建立容器内自蔓延高温合成固化数值模拟模型,对固化过程容器内温度-压力变化特征进行分析。利用COMSOL有限元分析软件,确定模型尺寸、单元类型和边界条件,计算得到点火后7200 s的容器内温度和压力随时间变化曲线。与相同条件的容器内SHS固化实验测量结果对比分析,数值模拟与实测情况一致性较强,能够较好反映SHS固化过程点火、燃烧、熄火、保温的四阶段性特征;模拟结果可作为容器安全性设计的参考数据。 | 陶钧 张继军 毛仙鹤 赵建伟 张东亮 蔡溪南 | 2018 | 化工学报2018，69，5： | 2 |
| 3 | Self-propagating synthesis joining of C_(f)/Al composites and TC4 alloy using AgCu filler with Ni-Al-Zr interlayer显示文摘The successful joining of carbon fiber-reinforced aluminum matrix(C_(f)/Al)composites and TC4 alloy can produce composite structure and meet the demands of lightweight in aerospace field.Up to now,few experimental researches have been reported on the joining of C_(f)/Al composites and TC4 alloy.In this study,the AgCu foils and Ni-Al-Zr compact were designed for the self-propagating high-temperature synthesis joining of these two materials.C_(f)/Al composites were joined with a reactive Ti plated on its joining surface.The typical microstructure of TC4/(AgCu/Ni-Al-Zr/AgCu)/Ti/C_(f)/Al joint was analyzed,and the effects of joining condition on microstructural evolution of the SHS joint were investigated.A thin reaction layer of Ni-Al-Ti intermetallic compounds was formed adjacent to the TC4 alloy.As a result,AgCu foils could reduce the effect of reaction heat on the substrates and improve the joint shear strength.When the thickness of AgCu foils reaches 150 lm,the Ni-Al-Zr interlayer mainly acts as auxiliary heat source.High joining pressure caused the active elements to diffuse into C_(f)/Al composites and weakened the shear strength of the joint.Finally,the joint shear strength could reach 36.4 MPa when the AgCu foils were 50 lm and the joining pressure was 2 MPa. | Lei Shen Zhuo-Ran Li Guang-Jie Feng Shu-Ye Zhang Zhi Zhou Peng He | 2021 | Rare Metals2021，40，7： | 1 |
| 4 | Cf/Al复合材料与TC4钛合金的激光诱导燃烧合成连接显示文摘采用激光诱导燃烧合成连接方法实现C_(f)/Al复合材料和TC4钛合金的可靠连接。放热中间层的燃烧合成反应为连接过程提供所需能量。结合理论计算和实验,对Ni−Al−Zr中间层的化学成分进行优化设计,并对连接接头的显微组织和力学性能进行研究。结果表明,Zr的加入轻微降低中间层的放热性,但显著提高连接质量,是实现可靠连接的关键。Ni−Al−Zr中间层与母材反应,在TC4钛合金侧生成TiAl_(3)反应层,在C_(f)/Al侧生成NiAl_(3)和Ni_(2)Al_(3)反应层。Zr含量决定接头的显微组织和剪切强度。当Zr含量为5 wt.%、连接压力为2 MPa时,接头最高剪切强度为19.8 MPa。 | 冯广杰 李卓然 何鹏 沈磊 周志 | 2022 | Transactions of Nonferrous Metals Society of China2022，32，2： | 0 |
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