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国家自然科学基金(51075101)

作品数:16 被引量:52H指数:4
相关作者:李卓然冯广杰徐慨徐晓龙张相龙更多>>
相关机构:哈尔滨工业大学更多>>
发文基金:国家自然科学基金航天科技创新基金更多>>
相关领域:金属学及工艺一般工业技术化学工程动力工程及工程热物理更多>>

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16 条 记 录,以下是 1-10
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玻璃与金属连接技术研究进展被引量:17
2013年
玻璃与金属连接技术已广泛应用于传感器的制造、包装及密封,因此研究玻璃与金属的连接有重要的科学意义和极大的工程价值。综述了玻璃-金属连接的基本问题:玻璃-金属连接的热应力与残余应力、玻璃表面的润湿及界面反应问题;较全面地介绍了几种连接工艺—匹配封接、阳极键合、钎焊、激光辅助连接、超声波摩擦焊、半固态连接及胶接;并提出了采用低温连接工艺来解决由于界面残余应力所引起的接头强度不高而失效是未来研究的重点。
李卓然徐晓龙
关键词:金属连接技术
Effect of Ti-Al content on microstructure and mechanical properties of C_f/Al and TiAl joint by laser ignited self-propagating high-temperature synthesis被引量:5
2015年
Cf/Al composites and TiAl alloys were joined by laser ignited self-propagating high-temperature synthesis(SHS) with Ni-Al-Ti interlayer. The effect of Ti-Al content on interfacial microstructure and mechanical properties of the joints was investigated. Localized melt of the substrates occurred in the joints. γ-Ni0.35Al0.30Ti0.35, NiA l3 and Ni2Al3 reaction layers formed adjacent to the substrates. Joint flaws, such as pores and cracks, made the joint density decrease and worked as the fracture source, which led to the sharp decline of joint strength. Additive Ti-Al increased joint density and strengthened the interlayer adhesion to Cf/Al. The joint flaws could be controlled by changing the Ti-Al content. When the Ti-Al content was 0.1, the joint was free of cracks with high density and reached the maximum shear strength of 24.12 MPa.
冯广杰李卓然冯士诚申忠科
关键词:JOINTINTERLAYER
High-efficiency Joining of C_f/Al Composites and TiAl Alloys under the Heat Effect of Laser-ignited Self-propagating High-temperature Synthesis被引量:4
2016年
The aim of this study was to develop a high-efficiency joining method of Cf/Al composites and TiA l alloys under the heat effect of laser-ignited self-propagating high-temperature synthesis(SHS). The SHS reaction of Ni–Al–Zr interlayer was induced by laser beam and acted as local high-temperature heat source during the joining. Sound joint was obtained and verified the feasibility of this joining method. Effect of filler metals on the joint microstructure and shear strength was evaluated. When the joining pressure was 2 MPa with additive filler metals, joint shear strength reached the maximum of 41.01 MPa.
Zhuoran LiGuangjie FengShiyu WangShicheng Feng
关键词:TIALSYNTHESISMICROSTRUCTURE
温度对C_f/Al与TiAl自蔓延连接接头界面及性能的影响被引量:1
2013年
采用自蔓延连接方法,在真空炉中利用中间层14Al-2Ni-3CuO实现了C f/Al复合材料与TiAl合金的连接.在连接接头中,靠近TiAl侧,中间层与TiAl生成TiAl3;靠近C f/Al侧,中间层与C f/Al生成NiAl3;在C f/Al复合材料中,中间层的Ni原子扩散到复合材料中,在C f/Al也有NiAl3生成.连接温度对接头界面组织及接头强度影响较大,随着连接温度的升高,中间层与TiAl生成的TiAl3层厚度明显增加.接头抗剪强度先逐渐增大,在550℃时最高可达26.9 MPa,当连接温度达到600℃时,接头的抗剪强度迅速降低.连接温度较低时,断裂多发生在靠近中间层的TiAl侧;连接温度较高时,断裂多发生在靠近中间层的C f/Al复合材料侧.
李卓然冯广杰徐慨张相龙
关键词:接头性能
Effects of Joining Conditions on Microstructure and Mechanical Properties of C_f/Al Composites and TiAl Alloy Combustion Synthesis Joints
2015年
Cf/Al composites and TiAl alloy were joined by combustion synthesis in different joining conditions. Effects of additive Cu, joining temperature and holding time on joint microstructure and shear strength were characterized by employing DTA, SEM, EDS, XRD and shear test. Results show that the additive Cu in the Ti-Al-C interlayer could significantly decrease the reaction temperature owing to the emergence of Al--Cu eutectic liquid. Reaction degree of the interlayer was influenced by joining temperature and holding time. Due to the barrier action of formed TiAl3 layer, reaction rate of Ti and Al was determined by the atoms diffusion. The reaction between Ti and AI was more sensitive to the joining temperature rather the holding time. The joints shear strength was influenced by joining condition directly. The maximum shear strength of CS joints was 25.89 MPa at 600 ℃ for 30 rain under 5 MPa. Interface evolution mechanism of the CS joint was analyzed based on the experimental results and phase diagram.
Guang-Jie FengZhuo-Ran LiRui-Hua LiuShi-Cheng Feng
SiC陶瓷真空钎焊接头显微组织和性能被引量:2
2015年
在高真空条件下采用Ti-35Zr-35Ni-15Cu(质量分数/%)钎料对SiC陶瓷进行了钎焊连接,研究了接头界面组织的形成过程以及工艺参数对接头性能的影响。结果表明:钎料与SiC陶瓷发生了复杂的界面反应,生成了多种界面产物。当钎焊温度为960℃,保温时间为10min时,SiC陶瓷侧形成了连续的TiC和Ti5Si3+Zr2Si层,同时Ti5Si3+Zr2Si向钎缝中心生长呈长条状。SiC陶瓷到接头钎缝中心的显微组织依次为:SiC/TiC/Ti5Si3+Zr2Si/Zr(s,s)/Ti(s,s)+Ti2(Cu,Ni)/(Ti,Zr)(Ni,Cu)。钎焊温度为960℃,保温时间为30min时,长条状的Ti5Si3+Zr2Si贯穿了整个接头。钎焊接头强度随着钎焊温度的升高和钎焊时间的延长都呈现先增大后减小的趋势。当钎焊温度为960℃,保温时间为10min时,接头的剪切强度最高,达到了110MPa。
冯广杰李卓然朱洪羽徐慨
关键词:SIC陶瓷真空钎焊显微组织剪切强度
Microstructure evolution and formation mechanism of laser-ignited SHS joining between Cf/Al composites and TiAl alloys with Ni-Al-Ti interlayer被引量:2
2017年
In this study, Cf/Al composites and TiAl alloys were joined by a new method named laser-ignited selfpropagating synthesis(SHS). Mixed powders of 63.0Ni-31.9Al-5.1Ti(wt%) were used as joining interlayer.Perfect joint was got. The microstructure evolution and formation mechanism of the SHS joint were investigated by scanning electron microscopy(SEM), energy-dispersive spectroscopy(EDS) and X-ray diffraction(XRD). Results show that localized melting occurs on both sides. One γ-Ni(0.35)Al(0.30)Ti(0.35) and two Ni-Al reaction layers form,respectively, in the TiAl/interlayer and Cf/Al/interlayer interfaces. The combustion of Ni-Al-Ti interlayer begins with the sharp reaction of Ni and Al. The interlayer product is a eutectic organization of NiAl and Al-rich γ.
Guang-Jie FengZhuo-Ran LiShi-Cheng FengWei-Jie Zhang
关键词:SHSMICROSTRUCTURE
Al-Ni-CuO中间层自蔓延连接C_f/Al与TiAl接头的微观形貌及其形成机制被引量:2
2013年
采用14Al-2Ni-3CuO中间层真空加热实现了Cf/Al复合材料与TiAl合金的自蔓延连接,获得了良好的接头.分析了Al-Ni-CuO粉末中间层的DTA曲线,研究了其放热机制,阐述了接头界面的形成过程.结果表明,加热温度升高到500℃,铝与CuO即发生氧化还原反应,放出大量的热;加热温度升高到600℃左右,中间层局部的实际温度已经超过了铝的熔点,铝开始熔化,液态铝将固态镍包围,铝与镍发生反应,生成NiAl3.在最终接头的TiAl侧,中间层与TiAl生成TiAl3;在Cf/Al侧,中间层与Cf/Al生成NiAl3;中间层中的镍向Cf/Al复合材料中扩散,与铝基体发生反应生成NiAl3.
李卓然冯广杰徐慨张相龙
关键词:微观形貌
ZrB_2-SiC陶瓷复合材料钎焊接头界面组织及性能被引量:3
2014年
采用BNi2钎料,对ZrB2-SiC陶瓷复合材料进行真空钎焊研究.借助SEM,EDS,XRD等分析测试手段分析了界面组织结构及性能.确定了最佳钎焊工艺参数:钎焊温度1160℃,保温时间20 min.结果表明,接头界面产物主要有δ-Ni2Si,β1-Ni3Si,ZrB2+C,Ni(s,s),Cr x B y C z.随着钎焊温度升高以及保温时间的延长,接头抗剪强度均先升高后降低.钎焊温度1 160℃,保温时间20 min,钎焊接头室温抗剪强度达到最大121.3 MPa.钎焊温度和保温时间对接头断裂方式的影响有相似的规律,在保温时间较短时,裂纹主要产生于钎缝中的Ni(s,s)中,之后向Ni元素扩散层中扩展;当保温时间适中时,断裂主要发生在Ni元素扩散层中;当保温时间延长时,裂纹主要产生于含有一定β1-Ni3Si相的Ni(s,s)中,之后向Ni元素扩散层中扩展.
徐晓龙李卓然刘睿华王征征
关键词:陶瓷复合材料钎焊抗剪强度
Microstructure and formation mechanism of SHS joining between C_f/Al composites and TiAl intermetallic with Al–Ni–CuO interlayer被引量:4
2015年
In this study, it was reported a novel approach for joining Cf/A1 composites and TiA1 intermetallic by self- propagating high-temperature synthesis (SHS). Mixed powders of 14A1-2Ni-3CuO were used as the SHS inter- layer, and differential thermal analysis test of A1-Ni-CuO interlayer was conducted to analyze the exothermic char- acteristic. Sound joint was got by SHS joining under the conditions of 600 ℃, 30 min, and 5 MPa. The joint was characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffrac- tion (XRD). TiA13 and NiA13 are, respectively, formed in the TiA1/interlayer and Cf/A1/interlayer interfaces. Reac- tion products of Ni2Al3, NiAl3, A1203, and Cu were observed in the interlayer. And the formation mechanism of SHS joining was investigated.
Zhuo-Ran LiGuang-Jie FengKai XuXiang-Long Zhang
关键词:SHSMICROSTRUCTURE
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