The present paper reports the influence of hot working conditions on the microstructure of Ti 2 AlNb/TC11 dissimilar joint. Linear friction welding technique was used to fabricate the joints. The microhardness and tensile properties of the joints have been tested. It was found that the fine structure of linear friction welds underwent abnormal grain growth and abnormal grain boundary phase growth in the post-weld solution heat treated condition. This phenomenon significantly deteriorated the ductility of the joint. After appropriate hot work, abnormal big grains/phases disappeared, and the joint exhibited good tensile properties due to its fine structures.
RBS@Cu:ZnO NPs are promising antibacterial agents and exhibit high and controllable antibacterial performance due to the synergistic effect of Cu-doped ZnO and released nitric oxide under light irradiation.
Abstract Microwave technique has become a promising candidate for non-destructive testing. In this study, microwave-based method was used to inspect type III hydrogen storage vessels and to identify void and crack defects in the carbon fiber composite wound layer. Using a vector network analyzer, the reflection coefficient S 11 of type III hydrogen storage vessel samples with no defects and with a void or a crack defect in the composite wound layer was measured. The defect-containing vessels had S 11 values significantly different from those of vessels without defects, based on which the defects can be detected. Moreover, identification of the two defects can be achieved by comparing the values of S 11 , as the void results in more microwave reflection than the crack. During the inspection, only when the horn antenna is against the defect does the S 11 show great changes, indicating the detection sensitivity of the method. This work provides new insights into inspection of defects in the of carbon fiber composite wound layer of type III hydrogen storage vessels.
A new CuFL (2-{2-chloro-6-hydroxy-5-[(2-methyl-quinolin-8-ylamino)-methyl]-3-oxo-3H-xanthen-9-yl}-benzoic acid)–CS (chitosan) NS diazeniumdiolates system consisting of NO donors and highly-sensitive NO probes is reported. FL–CS NS diazeniumdiolates were synthesized by incorporating the fluorescent molecule FL with chitosan (CS) and reacting the resultant FL–CS complex with pressurized NO and dimethyl sulfate (DMS). Then the FL–CS NS diazeniumdiolates were reacted with copper chloride (CuCl2) to generate non-fluorescent CuFL–CS NS diazeniumdiolates. The CuFL–CS NS diazeniumdiolates have a spherical outline with a dimension of ca. 250 nm. They have high selectivity for NO over other related substances. The results of in vitro and in vivo experiments indicate that the CuFL–CS NS diazeniumdiolates can release NO under physiological conditions and meanwhile detect the released NO based on the considerable fluorescence increase of the otherwise non-fluorescent system caused by the NO. The good fluorescence stability of the NO–FL–CS NS provides prospects for the CuFL–CS NS diazeniumdiolates in biomedical applications.
'/%3e%3cuse xlink:href='%23a' transform='rotate(23.036 .093 25.536)'/%3e%3cuse xlink:href='%23a' transform='rotate(45.87 1.273 16.18)'/%3e%3cuse xlink:href='%23a' transform='rotate(69.945 .996 12.078)'/%3e%3cuse xlink:href='%23a' transform='rotate(20.66 -19.689 31.932)'/%3e%3c/svg%3e)