冯吉才
个性化签名
- 姓名:冯吉才
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
精密仪器制造
- 研究兴趣:
冯吉才,男,1958年10月出生,中共党员,博士,教授,博士生导师。现任哈尔滨工业大学材料科学与工程学院院长。1983年1月毕业于哈尔滨工业大学焊接设备与工艺专业,获学士学位,并留校任教;1987年9月开始攻读硕士研究生,1990年3月毕业并获该专业硕士学位;1991年1月至1996年在日本大阪大学工学部攻读博士,1996年3月获工学博士学位。1996年4月入哈工大材料科学与工程博士后流动站,1997年12出站并被评为教授,1998年10月至1999年9月任日本大阪大学接合科学研究所特聘研究员;2000年4月被批准为博士生导师。曾任哈工大焊接设备及工艺教研室副主任、主任、焊接科学与技术系主任、现代焊接生产技术国家重点实验室常务副主任。2002年12月开始任哈工大材料学院院长。现兼任中国焊接学会常务理事、副秘书长,黑龙江省电子学会常务理事,中国电子学会生产加工委员会理事,中国焊接学会钎焊及特种连接委员会主任,黑龙江省政府科技顾问,材料科学与工艺主编。曾从事过点焊机器人焊接系统和精密点焊设备的研制,目前主要从事陶瓷、TiAl金属间化合物、异种金属、高强镁合金、铝锂合金等材料的特种连接,是新材料及异种材料连接方向的学术带头人。先后承担总装备部预先研究项目、国家自然科学基金、863高技术研究项目等项目。参编焊接手册和研究生教材4本,申报国家发明专利4项。1997年以来发表论文170余篇,其中SCI检索45篇次、EI检索50篇次,论文被国内外同行应用130余次。曾获得省部级一等奖一项、二等奖2项、三等奖3项及日本高温学会研究奖。2002年入选教育部跨世纪人才资助计划,2003年获得黑龙江省杰出青年基金和国家杰出青年基金。
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4826
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成果阅读
753
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成果数
10
【期刊论文】Numerical Simulation of Brazing TiC Cermet to Iron with TiZrNiCu Filler Metal
冯吉才, Lixia ZHANG, Jicai FENG*
,-0001,():
-1年11月30日
The maximum value of thermal stress and stress concentration zones of iron/TiC cermet joint during cooling were studied in this paper. The results show: the shear stress on iron/TiC cermet joint concentrates on the interface tip and the maximum value of shear stress appears on the left tip of iron/TiZrNiCu interface. Positive tensile stress on TiC cermet undersurface concentrates on both sides of TiC cermet and its value decreases during cooling. Negative tensile stress on TiC cermet undersurface concentrates on the center of TiC cermet and its value increases during cooling. Brazing temperature has little effect on the development and maximum value of thermal stress.
Numerical simulation,, Brazing,, TiC cermet,, Iron
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【期刊论文】Microstructure and Strength of Vacuum-Brazed Joint of TiAl-Based Alloy to 40Cr Steel
冯吉才, Huijie LIU and Jicai FENG
,-0001,():
-1年11月30日
Vacuum brazing of TiAl-based alloy to 40Cr steel has been carried out at 1173K for 0.5-40min using Ag-Cu-Ti filler metal. The microstructural analyses indicate that three reaction products, Ti(Cu,Al)2, Ag(s.s.) and TiC, are present in the brazing seam, and the interface structure of the brazed joint is TiAl/Ti(Cu,Al)2 +Ag(s.s.)/Ag(s.s.)+Ti(Cu,Al)2/TiC/40Cr. The experimental results show that the shear strength of the brazed TiAl/40Cr joints decreases as the brazing time increases, and it is up to 175MPa when the joint is brazed at 1173K for less than 2min.
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【期刊论文】Microstructure and Strength of TiC Cermet/Cast Iron Brazed with Ag-Cu-Zn Filler Metal
冯吉才, L.X. Zhang, J.C. Feng, Z.R. Li and H.J. Liu
,-0001,():
-1年11月30日
The brazing of TiC cermet to cast iron was carried out at 1223K for 5-30min using Ag-Cu-Zn filler metal. Formation phase, interface structure and shear strength of the joint were investigated. The results show: There occur three formation phases: Cu-base solid solution, FeNi and Ag-base solid solution in TiC cermet/cast iron joint. The amounts of Cu-base solid solution and FeNi increase and the amount of Ag-base solid solution decreases as brazing time increasing. When brazing time is 20min, the highest shear strength of the joint is up to 292.0MPa and the interface structure of the joint can be expressed as TiC cermet/Cu-base solid solution + FeNi/Ag-base solid solution + a little Cu-base solid solution + a little FeNi/Cu-base solid solution + FeNi/cast iron.
TiC cermet, Cast iron, Brazing, Interface structure
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【期刊论文】Microstructure and strength of the TiB2 cermet/TiAl joint diffusion bonded with Ni interlayer
冯吉才, Zhuoran LI, Jicai FENG, Jian CAO and Yiyu QIAN
,-0001,():
-1年11月30日
Vacuum diffusion bonding of TiB2 cermet to TiAl-based alloys using Ni interlayer has been carried out at 1123-1323K for 0.6-3.6ks under 80MPa. The effects of joining parameters on the microstructure of the joints and mechanical properties was investigated. The results showed that a TiAlNi2 intermetallic layer and two Ti, Al, Ni solid solution layers were formed at the interface of Ni/TiAl. The shear strength was 110MPa with bonding temperature T=1223K, bonding time t=1.8ks and bonding pressure P=80MPa.
diffusion bonding,, TiB2 cermet,, TiAl -based alloys
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84浏览
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250下载
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【期刊论文】Microstructure and strength of the TiAl/40Cr joint diffusion-bonded with Ti-V-Cu filler metal
冯吉才, Feng Jicai, He Peng, Qian Yiyu, Han Jiecai, Zhang Binggang
,-0001,():
-1年11月30日
In this study, intermetallic TiAl and steel 40Cr are diffusion bonded successfully by using a composite barrien layer Ti/V/Cu. In this case, a diphase Ti3Al+TiAl layer and a Ti solid solution which enhance the strength of the joint are obtained at the TiAl/Ti interface. The interface of TiAl/Ti/V/Cu/40Cr was free from intermetallic compounds and other brittle phases, and the strength of the joint was as high as 420MPa, very close to that of the TiAl base. This method gives a reliable bonding of intermetallic TiAl and steel 40Cr.
diffusion bonding,, microstructure,, TiAl
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88浏览
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724下载
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冯吉才, H. J. Liu, J. C. Feng and Y. Y. Qian
,-0001,():
-1年11月30日
diffusion bonding, interface, structural ceramic, intermetallic compound
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83浏览
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263下载
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冯吉才, Peng He, Jicai Feng, Binggang Zhang, Yiyu Qian
,-0001,():
-1年11月30日
In this study, intermetallic TiAl and steel 40Cr are diffusion bonded successfully by using a composite barrien layer Ti/V/Cu. The relationship of the bond parameters and tensile strength of the joints was discussed, and the optimum bond parameters were obtained. The reaction products and the interface structures of the joints were investigated by SEM, EPMA and XRD. In this case, a diphase Ti3Al+TiAl layer and a Ti solid solution which enhance the strength of the joint are obtained at the TiAl/Ti interface. Formation mechanism at the interface of TiAl/Ti was propounded. The whole reaction process can be divided into three stages. In the first stage, Ti (ss.Al) layer is formed at the interface TiAl/Ti40Cr. In the second stage, TiAl+ Ti3Al layer are formed adjacent to TiAl, in the mean, the continuous diffusion of Al atoms from TiAl to Ti gives occasion to the formation of Ti3Al. In the last stage, the thickness of each reaction layer increases with bonding time according to a parabolic law. The interface of TiAl/Ti/V/Cu/40Cr was free from intermetallic compounds and other brittle phases, and the strength of the joint was as high as 420MPa, very close to that of the TiAl base. This method gives a reliable bonding of intermetallic TiAl and steel 40Cr.
diffusion bonding,, microstructure,, TiAl
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75浏览
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冯吉才, J. Feng, D. Wang, H. Liu and Z. Li
,-0001,():
-1年11月30日
The development of thermal stress during the diffusion bonding of Al2O3 ceramic to Al is analyzed by the finite-element analysis using MARC/MENTAL code. Prior to diffusion bonding, a Cu layer of 0.2mm in thickness is sintered on the ceramic. The results show that shear stress concentration occurs in the ceramic near the corner of Al2O3/Cu interface, and tensile stress concentration occurs near the corners of Al2O3 outer surface during cooling from bonding temperature to room temperature. After tensile stress concentration on the Al2O3 undersurface rises to a certain value, ceramic deforms gradually, resulting in stress beginning to relax. The stress relaxation originates in the stress concentration region of Al2O3 outer surface.
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【期刊论文】Ag-Cu-Zn alloy for brazing TiC cermet/steel
冯吉才, Lixia Zhang, Jicai Feng, Baoyou Zhang and Xiangmeng Jing
,-0001,():
-1年11月30日
The microstructures of the TiC cermet/steel joint brazed with Ag-31Cu-23Zn brazing alloy (1123K, 20min) and Ag-54Cu-33Zn brazing alloy (1123K, 20/25min) were investigated. When the amounts of Cu and Zn increase in the brazing alloy, there are not many Cu-base solid solution stripes and blocks but few Cu-base solid solution blocks occurred in the middle of the brazing alloy.
Brazing alloy, Microstructure, Cermet, Joint
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【期刊论文】A New Model of Interfacial Physical Contact in Diffusion Bonding
冯吉才, Peng HE, Jicai FENG, Yiyu QIAN
,-0001,():
-1年11月30日
Through eliminating voids not affecting the primary bonding process, and incorporating interlayer and flexible base material, the interface geometry character and brief mathematics process was put forth. Through analyzing contact process of diffusion bonding, contact area model was settled. It can interpret the phenomenon of different interface areas taking on different strengths. In the course of physical contact, shear stresses serve an important function for the plastic deformation and the cohesion of interface voids.
Diffusion bonding, Physical contact, Interface layer
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