Nb-Mo-ZrB2 composites （V（Nb）/V（Mo） = 1） with 15v01% or 30v01% of ZrB2 were fabricated by hot-pressing sintering at 2000~C The phases, microstxucture, and mechamcal properties were then investigated. The composit...Nb-Mo-ZrB2 composites （V（Nb）/V（Mo） = 1） with 15v01% or 30v01% of ZrB2 were fabricated by hot-pressing sintering at 2000~C The phases, microstxucture, and mechamcal properties were then investigated. The composites contain Nb-Mo solid solution （denoted as （Nb, Mo）ss hereafter）, ZrB, MoB, and NbB phases. Compressive strength test results suggest that the strength of Nb-Mo-ZrB2 composites increases with increasing ZrB2 content; Nb-Mo-30vol%ZrB2 had the highest compressive strength （1905.1 MPa）. The improvement in the compressive strength of the Nb-Mo-ZrB2 composites is mainly attributed to the secondary phase strengthening oftke stiffer ZrB phase, sol- id-solution strengthening oftke （Nb, Mo）ss matrix as well as fme-grain strengtkening. The fracture toughness decreases with increasing ZrB2 content. Finally, the fracture modes oftke Nb-Mo-ZrB2 composites axe also discussed in detail.展开更多
Virtual reality(VR)uses computers or mobile devices as a core to generate an integrated multi-sensory digital environment consisting of the visual,auditory,tactile,olfactory and gustatory senses.The 2014 acquisition o...Virtual reality(VR)uses computers or mobile devices as a core to generate an integrated multi-sensory digital environment consisting of the visual,auditory,tactile,olfactory and gustatory senses.The 2014 acquisition of Oculus by Facebook Inc.,the 2015 introduction of HoloLens by Microsoft Inc.,and the founding of Magic Leap Inc.,have attracted widespread attention from academia,industry,and investment communities.Globally,there is a boom in research on VR technologies,with Google,Sony,Samsung,Epson,HTC,and other large international companies successively releasing related hardware products.In China,companies such as Baofeng Technology,Pico,DPVR,GoerTek,and Xiaomi have introduced numerous intelligent hardware devices that center on VR technology.展开更多
基金financially supported by the National Natural Science Foundation of China(No.11372110)
文摘Nb-Mo-ZrB2 composites （V（Nb）/V（Mo） = 1） with 15v01% or 30v01% of ZrB2 were fabricated by hot-pressing sintering at 2000~C The phases, microstxucture, and mechamcal properties were then investigated. The composites contain Nb-Mo solid solution （denoted as （Nb, Mo）ss hereafter）, ZrB, MoB, and NbB phases. Compressive strength test results suggest that the strength of Nb-Mo-ZrB2 composites increases with increasing ZrB2 content; Nb-Mo-30vol%ZrB2 had the highest compressive strength （1905.1 MPa）. The improvement in the compressive strength of the Nb-Mo-ZrB2 composites is mainly attributed to the secondary phase strengthening oftke stiffer ZrB phase, sol- id-solution strengthening oftke （Nb, Mo）ss matrix as well as fme-grain strengtkening. The fracture toughness decreases with increasing ZrB2 content. Finally, the fracture modes oftke Nb-Mo-ZrB2 composites axe also discussed in detail.
文摘Virtual reality(VR)uses computers or mobile devices as a core to generate an integrated multi-sensory digital environment consisting of the visual,auditory,tactile,olfactory and gustatory senses.The 2014 acquisition of Oculus by Facebook Inc.,the 2015 introduction of HoloLens by Microsoft Inc.,and the founding of Magic Leap Inc.,have attracted widespread attention from academia,industry,and investment communities.Globally,there is a boom in research on VR technologies,with Google,Sony,Samsung,Epson,HTC,and other large international companies successively releasing related hardware products.In China,companies such as Baofeng Technology,Pico,DPVR,GoerTek,and Xiaomi have introduced numerous intelligent hardware devices that center on VR technology.
