Tribological performance of nanometer samarium borate

来源 :Transactions of Nonferrous Metals Society of China | 被引量 : 0次 | 上传用户:lqgomqj
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Nanometer crystal samarium borate with a particle size of 20~40?nm was prepared using replacing solvent drying technique. The wear resistance and load carrying capacity of 500SN base oil could be improved and the friction coefficient could be decreased by the addition of nanometer samarium borate. But the dosage of samarium borate nanoparticles had to be controlled at a relatively low level, a higher concentration of nanoparticles was not of beneficial to the tribological performance of the oil. The optimal dosage of nanometer samarium borate is 1.0%. Tribochemical reactions took place in the tribological process, which resulted in the formation of deposition products including diboron trioxide and disamarium trioxide. Fe 2B and FeB were also found on the wear scar. The improvement of tribological properties of the oil comes from the formation of deposition layer and permeating layer. [ Nanometer crystal samarium borate with a particle size of 20 ~ 40 nm was prepared using replacing solvent drying technique. The wear resistance and load carrying capacity of 500SN base oil could be improved and the friction coefficient could be decreased by the addition of nanometer samarium borate But the dosage of samarium borate nanoparticles had to be controlled at a relatively low level, a higher concentration of nanoparticles was not beneficial to the tribological performance of the oil. The optimal dosage of nanometer samarium borate is 1.0%. Tribochemical reactions took place in the tribological process, which resulted in the formation of deposition products including diboron trioxide and disamarium trioxide. Fe 2B and FeB were also found on the wear scar. The improvement of tribological properties of the oil comes from the formation of deposition layer and permeating layer . [
其他文献
办公桌上仍放着地震时摔坏的台历架和,翻着“5.12”以后的,许多事情重现眼前……
The ageing behavior of an Nb-bearing microalloyed steel at 525℃was investigated by thermo-simulation test, hardness measurements and transmission electron micr
今年6月17日起,福建省将乐县连续6天暴雨滂沱,近百年一遇的特大洪水咆哮肆虐,多处山体发生泥石流。瞬间,农田被冲毁,洪水吞噬了农民赖以生存的水稻烟叶、瓜果蔬菜、鸡鸭牛羊
中纪委、中组部近日联合召开新闻发布会,通报了陕西省商洛市委原常委、商州区原区委书记张改萍通过为他人晋升职务牟利等7起违反组织人事纪律的典型案件。张改萍的典型与他人
一个本来很优秀的银行科长,有着光明灿烂的前途,竟因为贪图功名利禄,置党纪国法于不顾,陷入犯罪的深渊难以自拔,最后身败名裂。    功利世俗,踯躅彷徨    修益,原中共党员,1995年28岁的他就担任了大连中山区某银行信用卡科兼储蓄科科长,可谓平步青云,人生得意,组织上对他非常信任。夜深人静,他躺在床上,想着自己的人生之路,普通警卫——储蓄员——储蓄所长——双料科长,一帆风顺……浑身都充满了激情,
有一个美丽的传说,看到流星时马上许愿,就可以实现心中的愿望。可是,作为爱科学的我们,不免要较个真:从看到流星到流星消失,一共会持续多长时间,够不够我们许一句话的心愿呢?  许一个心愿,一般需要10至30个字,也就是3至10秒。比如:我希望全家健康幸福。那么,流星从天空中出现到消失,可以持续3秒以上吗?  先来了解一下究竟什么是流星。在星际空间,有很多细小的物体和尘粒,叫作流星体。流星体一般是围绕太
期刊
(接上期)对于专业的或达到一定程度的学生来说,音乐的表达必须结合弓法与运弓、指法、节奏、揉弦等具体的技术训练来演奏。学生在学习的过程中如何制定弓法和指法是学生学习
Tryptophan residues in hyaluronidase (HAase) were modified by N-bromosuccinimide (NBS),the results indicated that there were eleven tryptophan residues in HAase
一rn“渤海湾,白沙滩,人马叫,船下帆,鱼蟹肥,娘们欢……”rn这首裹着海风,拌着海腥的歌谣,在曹海川的记忆里,在他光着屁股满海滩跑的时候就会唱.rn那时他懵懂,出海十天半月归
9月下旬,索尼公司正式宣布推出基于英特尔最新移动平台——酷睿2代的VAIOVGNBX2系列商务笔记本电脑。索尼VAIOBX2在中国地区搭载了经由国家认证的兆日T P M芯片,成为了首个获