报告题目： Development and characterization of low melting point binder for making diamond impregnated drilling bits
报 告 人：蔡明东 博士 美国Schlumberger公司 先进材料研究高级工程师
报告时间：2016年5月26日（星期四）9:30
报告地点：www.优德88.cpm 机器人与微系统研究中心会议室(北校区工科楼1107室 )
Abstract: Diamond impregnated drilling bits have been widely used in drilling deep, hard and abrasive rock formations, such as sandstone, granite in Vietnam, Khatatba in Egypt and basalt in North Sea. To achieve an acceptable rate of penetration, diamond impregnated drilling bits are usually run with turbo drilling unit (e.g. Neyfor turbo drill) to obtain a rotation speed of over 750 rpm. Current exploration of geo-thermal wells makes diamond impregnated bit an ideal tool due to its thermal stability at high temperatures. The performance of diamond impregnated drilling bits is highly dependent on the diamond strength, developing low melting point binder and therefore lowering the infiltration is critical in sustaining diamond strength. In this work, we applied a multi-component thermodynamics software package (i.e. Pandat 8.2™) to develop new low melting point Cu-based binders. A GB30 binder, with a melting point of over 150°F lower than the baseline GB4 (melting point of about 1670°F) and comparable mechanical properties after infiltrated with carbide, was identified and characterized.
Biography: Dr. Cai received his BS degree in Metallurgical Engineering and MS degree in Materials Processing from Southeast University in 1996 and 1999, respectively. Mingdong earned his Ph.D. degree in Materials Science and Engineering from the University of Manchester (U.K.) in 2004. Dr. Cai then worked at Washington State University for three years as Postdoctoral Research Associate and then at University of Houston as Visiting Assistant Professor before joined industry in 2008. Dr. Cai has been an active researcher in academia and have published over 50 technical papers and gave has more than 40 conference presentations in the area of physical metallurgy of aluminum alloys, thermal-mechanical processing, surface science and engineering, laser-materials interactions, thin film functional materials, and solidification, etc.
Dr. Cai holds Research Engineer position at Schlumberger Inc. His current research interest includes fracture mechanics, alloy development, powder metallurgy with emphasis on Oil and Gas applications. He is also an adjunct Professor of Southeast University (China).
Dr. Cai serves on the Editorial Board for the China Foundry Journal and recently co-edited an issue of Journal of Materials Engineering and Performance (in Vol.20 of 2011). Dr. Cai has been an active member of TMS since he joined in 2004. As a member in the TMS EPD Materials Characterization and TMS EPD Shaping and Forming Committees, he currently serves as Technical Advisor to JOM and co-Chair of the TMS Materials Characterization Committee.
