排序方式: 共有2条查询结果,搜索用时 0 毫秒
1
1.
AWADESH KR MALLIK NANADADULAL DANDAPAT PRAJIT GHOSH UTPAL GANGULY SUKHENDU JANA SAYAN DAS KAUSTAV GUHA GARFIELD REBELLO SAMIR KUMAR LAHIRI SOMESWAR DATTA 《Bulletin of Materials Science》2013,36(2):193-202
Diamond-like nanocomposite (DLN) coatings have been deposited over different substrates used for biomedical applications by plasma-enhanced chemical vapour deposition (PECVD). DLN has an interconnecting network of amorphous hydrogenated carbon and quartz-like oxygenated silicon. Raman spectroscopy, Fourier transform–infra red (FT–IR) spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD) have been used for structural characterization. Typical DLN growth rate is about 1 ${\upmu} $ m/h, measured by stylus profilometer. Due to the presence of quartz-like Si:O in the structure, it is found to have very good adhesive property with all the substrates. The adhesion strength found to be as high as 0·6 N on SS 316 L steel substrates by scratch testing method. The Young’s modulus and hardness have found to be 132 GPa and 14· 4 GPa, respectively. DLN coatings have wear factor in the order of 1 × 10???7 mm 3 /N-m. This coating has found to be compatible with all important biomedical substrate materials and has successfully been deposited over Co–Cr alloy based knee implant of complex shape. 相似文献
2.
Nandadulal DANDAPAT Sumana GHOSH Kalyan Sundar PAL Someswar DATTA Bichitra Kumar GUHA 《中国有色金属学会会刊》2014,24(6):1666-1673
Alumina was joined with graphite by active metal brazing technique at 895, 900, 905, and 910 °C for 10 min in vacuum of 0.67 mPa using Ti-Cu-Ag (68.8Ag-26.7Cu-4.5Ti; mass fraction, %) as filler material. The brazed samples were thermal cycled between 30 and 600 °C and characterized. X-ray diffraction results show strong reaction between titanium and carbon as well as titanium and alumina. Scanning electron microscopy and helium leak tests show that the initial and thermal cycled brazed samples are devoid of cracks or any other defects and hermeticity in nature. Brazing strength of the joints is found to be satisfactory. 相似文献
1