Methods the influence of fluoride on the rat first passage osteoblast were evaluated by histochemistry , enzymehistochemistry and electron microanalysis in vitro 方法应用组织化学、酶组织化学和电子显微分析等手段观察氟对体外培养的鼠第一代成骨细胞的影晌。
Through sem , metallographic microscope and electronic probe microscopical analyzer , the microstructures of the alloy are studied and the properties are analyzed 借助电子扫描显微镜、金相显微镜、电子探针显微分析仪等方法研究合金的显微组织，分析合金的性能。
In order to reduce and compensate charge phenomena at the surface of non - conductive oxide materials under the electron irradiation , oxygen environmental scanning electron microscopy ( sem ) is offered in this thesis 本论文提出氧环境扫描电子显微分析方法，以减轻和补偿非导电氧化物类样品在电子束辐照作用下的表面充电现象。
By analyzing the microstructure and phase composition of sm - fe alloy annealed and nitrided for different time using scanning electron microscopy and x - ray diffraction technique , the optimum values for the annealing time and the nitriding time is determined 通过对不同退火时间和氮化时间下材料的扫描电子显微分析和x -射线衍射分析，确定了最佳的退火时间和氮化时间。
By means of mechanical properties determination , optic and electronic microscope examination and practical application it is verified that the usage of cap type filter could improve steel casting properties and effectively reduce inclusive cast defects in investment casting 通过测定铸钢试样的力学性能、进行金相分析、电子显微分析和生产应用，验证了采用熔模铸造帽式过滤器能改善铸钢性能、有效减少精铸件由于夹杂所造成的废品。
Based on the analyses on mechanical properties , microstructure and fracture of - the microalloyed steels socrv with various heat treatment technique , it can be affirmed that various fractures arttribute to various mechanism , we can draw conclusion that the strength and toughness of microalloyed steels 50crv will be increase simultaneously by optimal heat treatment technique . to illustrate the mechanism of the strength and toughness of microalloyed steels socrv , we designed the comparative experiment and observed the microstructure of the sample which occurred at different quench and tempering temperature and different tempering time . the last experiment results were determined by the four factors : fined microalloyed elements grains , the decompound of martensite , martensite transformation of remnant austenite and the second phase precipitation 为解释微合金化50crv钢强韧化机理，本文通过对不同淬火温度，回火温度，回火时间下的力学性能指标的对比及显微分析，认为微合金元素的细化晶粒，马氏体的回火分解，残余奥氏体的转变，第二相的沉淀析出共同决定了微合金钢的强韧化情况，特别是由于微合金元素的存在，其细化晶粒及其碳氮化物的沉淀析出，导致钢的良好的强韧性，并且如果工艺满足第二相的沉淀析出强化大于回火马氏体分解引起的软化效应，会在硬度曲线中产生明显的二次硬化现象。
This paper systematically discussed the fundamental , characteristics , research status and equipment of microwave sintering , and introduced the preparation and development of sintered ndfeb magnets , on the basis of which the effects of the parameters on the heating rate and sintering temperature were investigated . and by means of optical metallurgical analysis , x - ray diffraction analysis and the measurement of density and magnetic properties , the paper compared the properties and technology of ndfeb magnets sintered in microwave magnetic field with that of magnets sintered in conventional heating process 本文系统论述了微波烧结基本原理、特点、研究现状和烧结设备，介绍了烧结ndfeb制备工艺和发展，在此基础上研究了微波磁场烧结ndfeb永磁材料过程中各因素对升温速率、烧结温度的影响，并通过金相显微分析、 x射线衍射分析、密度及磁性能测试等手段，将微波磁场烧结的ndfeb磁体与常规烧结的磁体进行了工艺与性能的对比分析。
The anti - burnout character was improved obviously after the metallization be made more thick . the analysis on the gaas mmic metallization which burnout has been occured proved that the main reason was that the metallization is too thin to endure the mechanical stress , so the collapse will trigger the circuits burnout 对gaasmmic互连出现的烧毁现象的显微分析表明，主要是空气桥金属化层过薄，尤其是搭接处易出现塌陷，金属层加厚后，互连线的烧毁能力有明显改善。
