It was considered that , the substituted ti reacted with ni3al in - situ and a layer of mo solid solution was formed around the tic particles , which decreased the solid - liquid surface tension between ni3al - tic , leading to the decreasing of wetting angle 掺入mo后置换出的ti与ni _ 3al发生原位反应,在tic颗粒周边形成一个含mo的固溶壳层,降低了ni _ 3al - tic之间的液-固表面张力,导致了接触角的下降。
In situ reaction between oxide and al is a diffusing process of reaction atoms . in this process , an integrated reaction membrane is engendered in the interface of oxide and al firstly . then the synthesis reaction holds on through the reaction atoms " diffusion 氧化物与al的原位反应是一个反应原子的扩散过程,反应在氧化物与al的界面上进行并形成完整的反应膜,然后合成反应通过反应原子的双向扩散在界面上进行。
So this research proposes a new idea to fabricate aluminum matrix composites by combining several oxides to react with al at the same time . this idea overcomes the shortages of cuo / al system and the other single oxide system . it extends in situ reaction system 因此,本研究采用多种氧化物cuo 、 tio _ 2 、 sio _ 2 、同时与al发生原位反应弥补了单质氧化物与al反应的不足,发挥了各自氧化物的优点,控制了剧烈的铝热反应,扩充了原位反应的热力学体系。
Based on the literature analysis of al matrix in - situ composites by reaction synthesis , it is found that in - situ reaction synthesis processed can ameliorate wettability between reinforcement phase and al matrix alloys and strengthen interfacial bonding and improve mechanical properties of al matrix composites 对反应生成的原位铝基复合材料的研究表明,原位反应合成技术可以改善强化相与基体铝合金之间的润湿性,强化界面连接,提高材料的综合机械性能。
In cuo + sio2 + tio2 / al reaction system , the element ti which is replaced in the reaction makes the microstructure of composite thin and the matrix strong . the mechanical properties of the composites fabricated by this reaction system are much finer than the ones fabricated by cuo + sio2 / al and cuo + tio2 / al reaction system . in cuo + tio2 / al reaction system , the wild phase al3ti is very large and it is disadvantageous to the improvement of composites " properties 在四种原位反应体系中, cuo + sio _ 2 + tio _ 2 al原位反应过程中被置换出来的金属元素ti细化了基体组织,并起到了固溶强化的作用,所制备的复合材料的微观组织与机械性能明显优于cuo + sio _ 2 al与cuo + tio _ 2 al原位反应体系所制备的复合材料。
反应: neaction定位反应: placing reaction方位反应: position reaction光定位反应: light compass reaction亏氢位反应: unsaturated-site reactions配位反应: complexation reaction; complexing reacion; complexing reaction; coordination reaction配位反应性: ligand reactivity直立位反应: orthostatic response皮肤电位反应: skin potential response相位反应曲线: phase response curve; phase-response curve用药部位反应: application site reaction植入部位反应: implant site reaction注射部位反应: injection site reaction电位反应听力检查: auditory evoked-response testing水位反应性系数: water-level reactivity coefficient药物植入部位反应: drug implant site reaction原位聚合酶链反应,原位pcr: in situ polymerase china reaction原位多聚酶链反应: in situ polymerase chain reaction原位: home position; i itu; in situ; insitu; normal position; root position原位聚合酶链式反应: in situ pcr听觉脑干诱发电位反应试验: auditory brainstem evoked potential response testkleijn静位反射: static reflex of magnus and de kleijn单位反馈: unit feedback定位反馈: feedback, position; position feedback定位反射: orientating reflex