|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Relationship of microstructure transformation and hardening behavior of type 17-4 PH stainless steel显示文摘The relationship between the microstructure transformation of type 17-4 PH stainless steel and the aging hardening be- havior was investigated. The results showed that, when 17-4 PH stainless steel aging at 595°C, the bulk hardness of samples attains its peak value (42.5 HRC) for about 20 min, and then decreases at all time. TEM revealed the microstructure corresponding with peak hardness is that the fine spheroid-shape copper with the fcc crystal structure and the fiber-shape secondary carbide M23C6 precipitated from the lath martensite matrix. Both precipitations of copper and M23C6 are the reasons for strengthening of the alloy at this tem- perature. With the extension of holding time at this temperature, the copper and secondary carbide grow and lose the coherent rela- tionship with the matrix, so the bulk hardness of samples decreases. | Jun Wang Hong Zou Cong Li Ruling Zuo Shaoyu Qiu Baoluo Shen | 2006 | Journal of University of Science and Technology Beijing2006，13，3： | 10 |
| 2 | Chemical Mechanical Polishing of Glass Substrate with α-Alumina-g-Polystyrene Sulfonic Acid Composite Abrasive显示文摘Abrasive is the one of key influencing factors during chemical mechanical polishing(CMP) process. Currently, α-Alumina (α-Al2O3) particle, as a kind of abrasive, has been widely used in CMP slurries, but their high hardness and poor dispersion stability often lead to more surface defects. After being polished with composite particles, the surface defects of work pieces decrease obviously. So the composite particles as abrasives in slurry have been paid more attention. In order to reduce defect caused by pure α-Al2O3 abrasive, α-alumina-g-polystyrene sulfonic acid (α-Al2O3-g-PSS) composite abrasive was prepared by surface graft polymerization. The composition, structure and morphology of the product were characterized by Fourier transform infrared spectroscopy(FTIR), X-ray photoelectron spectroscopy(XPS), time-of-flight secondary ion mass spectroscopy(TOF-SIMS), and scanning electron microscopy(SEM), respectively. The results show that polystyrene sulfonic acid grafts onto α-Al2O3, and has well dispersibility. Then, the chemical mechanical polishing performances of the composite abrasive on glass substrate were investigated with a SPEEDFAM-16B-4M CMP machine. Atomic force microscopy(AFM) images indicate that the average roughness of the polished glass substrate surface can be decreased from 0.835 nm for pure α-Al2O3 abrasive to 0.583 nm for prepared α-Al2O3-g-PSS core-shell abrasive. The research provides a new and effect way to improve the surface qualities during CMP. | LEI Hong BU Naijing ZHANG Zefang CHEN Ruling | 2010 | Chinese Journal of Mechanical Engineering2010，23，3： | 9 |
| 3 | Preparation of porous Fe203/Si02 nanocomposite abrasives and their chemical mechanical polishing behaviors on harddisk substrates显示文摘 | Hu L Hong L Ruling C | 2012 | 77im Solid Fite2012，520，： | 1 |
| 4 | Isolation and Identification of a Cellulose-degrading Bac- terium from Paddy Soils in Chengdu City显示文摘In this study,a cellulose-degrading bacterium was isolated from paddy soils in Chengdu City.After 2 d of culture,the average diameter of hydrolytic circles on CMC-Congo red medium was 26-30 mm.Single colonies on LB plates were white and wrinkled.The isolated strain was identified as a Gram-negative bacterium by Gram staining,which could produce short rod-like spores.Colony PCR was performed using the bacterial 16S rDNA universal primers.A 1 429 kb DNA fragment was amplified.Based on sequence homology analysis and comprehensive analysis,the isolated strain was identified as Bacillus velezensis,which was named CDBV62 according to the origin. | Yulong CHEN Zhiyu SUN Jintao LI Ling SHEN Ruling HONG | 2016 | Agricultural Biotechnology2016，5，5： | 1 |
| 5 | Preparation of copper-in- corporated mesoporous alumina abrasive and its CMP behavior on hard disk substrate 显示文摘 | Lei Hong Jiang Lei Chen Ruling | 2012 | Powder Technology2012，219，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员