Tribological Behavior of Amorphous and Crystalline Overbased Calcium Sulfonate as Additives in Lithium Complex Grease
文献类型：期刊论文
| 作者 | Liu DB(刘大波)1,2; Zhang M(张明)1 ; Zhao GQ(赵改青)1; Wang XB(王晓波)1
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| 刊名 | Tribology letters
 |
| 出版日期 | 2012 |
| 卷号 | 45期号:2页码:265-273 |
| 关键词 | Amorphous overbased calcium sulfonate Calcite Additive Lithium complex grease Tribological behavior |
| ISSN号 | 1023-8883 |
| 通讯作者 | 王晓波 |
| 英文摘要 | The aim of this study was to examine the tribological behavior of amorphous overbased calcium sulfonate (AOBCS) and crystalline overbased calcium sulfonate (COBCS, transformed from the AOBCS) as additives in lithium complex grease. The transformation product of the calcium carbonate polymorph from AOBCS was calcite, as determined by Fourier transform infrared spectroscopy. Tribological properties were evaluated by an oscillating reciprocating friction and wear tester and a four-ball tester. The results showed that the addition of COBCS can dramatically improve both the antiwear performance and the friction-reducing and load-carrying properties of the base grease. However, improvement of the tribological properties of the base grease by AOBCS was highly dependent on the concentrations added and the loads applied. The tribological properties of the base grease were improved more by the addition of COBCS than by the addition of AOBCS. X-ray photoelectron energy spectrometry and thermogravimetric analysis revealed that both AOBCS and COBCS underwent complicated tribochemical reactions in the base grease and that chemically reactive films consisting of CaCO3, CaO, iron oxide and organic compounds were formed on the worn surfaces. Taken together with the results of the tribo-tests, we suggest that transformation of the calcium carbonate polymorphs was the main factor in improving the tribological properties of lithium complex grease. The transformation of calcium carbonate polymorphs can broaden the application of AOBCS as an extreme pressure/antiwear additive in greases under boundary lubrication conditions. |
| 学科主题 | 材料科学与物理化学 |
| 收录类别 | SCI |
| 资助信息 | the National 973 Program of China (Grant No. 2011CB706603) |
| 语种 | 英语 |
| WOS记录号 | WOS:000299136400005 |
| 公开日期 | 2013-07-12 |
| 源URL | [http://210.77.64.217/handle/362003/3499]  |
| 专题 | 兰州化学物理研究所_固体润滑国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu DB,Zhang M,Zhao GQ,et al. Tribological Behavior of Amorphous and Crystalline Overbased Calcium Sulfonate as Additives in Lithium Complex Grease[J]. Tribology letters,2012,45(2):265-273. |
| APA | Liu DB,Zhang M,Zhao GQ,&Wang XB.(2012).Tribological Behavior of Amorphous and Crystalline Overbased Calcium Sulfonate as Additives in Lithium Complex Grease.Tribology letters,45(2),265-273. |
| MLA | Liu DB,et al."Tribological Behavior of Amorphous and Crystalline Overbased Calcium Sulfonate as Additives in Lithium Complex Grease".Tribology letters 45.2(2012):265-273. |
入库方式： OAI收割
来源：兰州化学物理研究所
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