jessica8918
Difference in coefficient of thermal expansion of Al3Zr+ZrB2 particles and substrate, forming high density dislocations in the matrix, preventing the dislocation between the relative sliding, dispersion-strengthened role to play. Strengthening effect of Al3Zr+ZrB2 granules for 2,124 alloy, strength and wear resistance of composite materials are clearly higher than 2,124 matrix alloys, and more uniform, small particle size distribution of Al3Zr+ZrB2, on the body of composite strengthening effect more obvious.(2) under pulsed magnetic field (ZrB2+A13Zr) p/2124 mechanical properties of composites research results indicate that the pulsed magnetic fields can cause (ZrB2+A13Zr) p/2124 endogenous A13Zr and composite materials ZrB2 uniform particles distribution in matrix variable, small size and variable, morphology rounded. As the pulsed magnetic field strength and time increase, size small, spread out more evenly, and dispersed particles makes material comprehensive performance, particularly strength and wear properties with a larger increase. Magnetic fields around best time of 20min over 20min particle coarsening phenomenon.(3) magnetic reaction Xia preparation of (Al3Zr+ZrB2) p/2124 composites and does not added magnetic field Xia of composites compared to, its material internal Al3Zr+ZrB2 particles distribution obvious small, and uniform, wear performance are has has obvious of improve, especially in load larger Shi wear performance improve ranges more large; as magnetic field strength of increased, wear performance will further increased, but in magnetic field strength reached a a critical value Shi, its wear sexual increased of degree is small.希望能帮助你，
理想气体911
弥散强化指一种通过在均匀材料中加入硬质颗粒的一种材料的强化手段。是指用不溶于基体金属的超细第二相(强化相)强化的金属材料。为了使第二相在基体金属中分布均匀，通常用粉末冶金方法制造。
cindydaniel
出处没找到，但记得“沉淀强化”是“precipitation hardening”，也叫”时效强化/ageing hardening“，是过饱和固溶体受热激活脱溶分解出子相充当强化相的强化类型；”弥散强化“ 是“Dispersion strengthening”，在氧化物弥散强化的粉末冶金材料和陶瓷材料中遇到过~
好吃的小蓝
(1)The differences between Al3Zr + ZrB2 particles and the thermal expansion coefficient of matrix, makingthe high density matrix be formed in a wrong way, obstructing the dislocation of the relative sliding between each other, plays the role of dispersion strengthening. Al3Zr + ZrB2 particles' strengthening function for 2124 alloy causes the composite material strength and wear performance to be significantly higher than the 2124 base alloy, and for Al3Zr + ZrB2 particle size distribution, the more uniform and fine,the more obvious the body of composite material strengthening function is .(2) Under the action of pulse magnetic field, (ZrB2 + A13Zr) p / 2124 composite material mechanics performance of the results of the study show that:the pulse magnetic field can make(ZrB2 + A13Zr) p / 2124 composite material produce inner A13Zr and ZrB2 and then strengthen endogenous particles in matrix distribution become uniform, size tiny and morphology rounded . Along with the pulse magnetic field intensity and duration increase, the dimension decrease and the distribution bebome more uniform , while the scattered particle makes the comprehensive performance of materials, especially the strength and wear performance, be greatly raised. But the best role time of magnetic field's function is around 20 min, and particles will coarsen after 20 min.(3)Compared with those made without the reaction of magnetic ,Al3Zr + ZrB2 particles' size and distribution of the (Al3Zr + ZrB2) p / 2124 composite materials made under the reaction of magnetic are obviously smaller, and more uniform,while the wear-resisting performance of them is improved, and it is improved greater especially when they are under huge load . Along with the increase of the magnetic field strength, wear-resisting performance will further increase, but when the magnetic field strength achieves some critical value, the degree of increase is quite small . 小试牛刀，不当之处请谅解
