【摘 要】
：
316L stainless steel samples,as a widespread used material,were irradiated with HIPIB at the beam parameters of ion energy 300 keV,current density 100,200 and 3
【机 构】
：
School of Materials Science and Engineering
论文部分内容阅读
316L stainless steel samples,as a widespread used material,were irradiated with HIPIB at the beam parameters of ion energy 300 keV,current density 100,200 and 300 A/cm2,shot number 10 and pulse duration 75 ns. The surface morphology and the phase structure in the near surface region of original and treated samples were analyzed with scanning electron microscopy (SEM) and X-ray diffractometry (XRD). It is shown that the HIPIB irradiation can smooth the surface of the samples,and the preferred orientation is present in the surface layer of irradiated coupons. The influence of HIPIB irradiation on the oxidation behavior of 316L stainless steel at 700 ℃ for up to 100 h was investigated. Electron probe microanalysis (EPMA) was used to study the distribution of elements in the oxidation products. It is found that the oxidation behavior of the irradiated coupons depends greatly on the ion current density of HIPIB. HIPIB irradiation with ion current density of 100 A/cm2 slightly reduces the oxidation rate with respect to the unirradiated coupon. The improvement of the oxidation resistance can be attributed to more oxide of Cr that forms on the surface of the irradiated coupons. In contrast,HIPIB irradiation with ion current density of 200 or 300 A/cm2 is proved to be detrimental,causing a higher oxidation rate.
其他文献
A nano-crystalline diamond (NCD) film with a smooth surface was successfully deposited on silicon by a hot filament chemical vapor deposition (HFCVD) method. Sc
This is a synthetical report about hydrogen behavior in titanium aluminide alloys in our group. There are two kinds of hydrogen solubility in titanium aluminide
The catalytic performance of perovskite composite oxide catalyst La0.9 K0.1 CoO3 coated on catalyst supports by trnditional solid state reaction method and sol-
The evolution of ordered interphase boundary (IPB) of Ni75AlxV25-x alloys was simulated using the microscopic phase-field method. Based on the atomic occupation
Materials with negative thermal expansion have many important applications such as constituents of composite materials designed to .reduce their overall thermal
The axial mixing is a key factor for design and scaling up of the pulsed extraction column which has strong influence on the mass transfer performances of the p
One way of improving the magnetic properties of RECo5 (RE=rare earth) compounds, especially the magnetic anisotropy energy (MAE), is to dope them with some addi
The optical properties of blue emitting BaAl2S4:Eu thin-films were studied. The emission peak is around 470 nm, whose FWHM (full width at half maximum) is 35 nm
Transparent polycrystalline yttria is a promising optical ceramics with excellent physical and chemical properties. A commercial yttria powder with a mean parti
The formation ability and thermal stability of phosphate laser protection glass doped with high Sm2O3 content were discussed. The characteristic temperatures (T