【摘 要】
：
Cu matrix composites reinforced by TiB2/TiN ceramic reinforcements(Cu/TBN composites)were prepared by hot pressing method.Prior to the hot pressing,Cu/TiB2/TiN
【机 构】
：
State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of
论文部分内容阅读
Cu matrix composites reinforced by TiB2/TiN ceramic reinforcements(Cu/TBN composites)were prepared by hot pressing method.Prior to the hot pressing,Cu/TiB2/TiN composite powders(CTBN powders),which were used as the starting materi-als of Cu/TBN composites,were fabricated by self-propagating high-temperature synthesis method.The CTBN particles were found to be in a special core-shell structure with a Cu-Ti alloy core and a TiB2/TiN ceramic shell.The test results presented obvious improvements in mechanical properties.The highest ultimate tensile strength reached up to 297 MPa,77 MPa higher than that of Cu.And the highest hardness reached up to 70.7 HRF,15.7 HRF higher than that of Cu.A comparative study indicated that the core-shell structured particles could bring about more obvious strengthening effect than the traditional irregularly shaped particles,which was due to the improved Cu/ceramics interfacial bonding,the linkage strengthening effect of both TiB2 and TiN,and higher load bearing ability of the core-shell structured reinforcements.
其他文献
本文在简述成语定议、来源、结构形式及小学语文中成语教学的必要性基础,结合小学生身心特点以及我校开展成语特色文化建设方面的经验,探讨小学语文中的成语教学方式方法、禁
黄宾虹晚年曾言：“艺术家经数十年身后才有真评，此中明眼人知之。古之名家当时不急求知于人，而惟就有真赏鉴与好事收藏者界之，不遇其人，宁自甘贫，不妄干人。”又言，“文艺只是可为知
成语活用于广告领域由来已久.文章用功能主义语言学理论,结合一些经典的范例,研究的视角触及到成语广告语的焦点结构和主位结构.研究结果表明:只要遵循使用的基本原则,注重商
我们现在总会很轻易的说出“随身音乐”、“音乐无处不在”这样的字眼,殊不知要想做到这一点足足历经了130年的历程。而真正将个人随身音乐发挥到极致的并不是几年前大家看好
成语是我国语言宝库中的瑰宝，更是语言文化的精华。它不仅言简意赅，而且生动传神，能够让以最简洁的语言，把思想感情表达得淋漓尽致。成语的形成是建立在我国千百年的文化发展基础
Effects of silicon on the microstructure and mechanical properties of 20％ cold-worked 15-15Ti austenitic stainless steels are systemically investigated by uniaxi
First-principles thermodynamic calculations were carried out at the interface level for understanding the precipitation of coherent L12-phase nano-structures in
常州是个有历史,有文化的城市.据考古发现,常州地区在6000年前就有人类居住于此.常州有文字记载的历史近3000年.有我国现存的最古老、保存最完整的、距今3000余年历史的春秋
2004年元月9日,经朋友的介绍我踏上成都至昆明的列车,前往凉山彝族自治州德昌县巴洞乡团结村拍摄傈僳族姑娘张正秀的婚礼。
January 9, 2004, introduced by friends, I set
作文教学是语文教学的重要组成部分,对提高学生语文素养具有不可轻忽的功用.当下的作文教学存在较多的问题,其症结是视作文教学为单一的"章法""技法"传受,处理成封闭式的训练