权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Internal oxidation method of metals and alloys with internally dispersed oxygen sources

内部分散氧源金属及合金的内氧化方法

基本信息

批准号：
10650716
负责人：
KANEKO Junichi
金额：
$ 1.92万
依托单位：
Nihon University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650716/
关键词：
internal oxidation mechanical alloying power metallurgy copper alloy magnesium metal oxide solid state reaction 分散強化

项目摘要

Hard and brittle oxide particles can be dispersed finely and uniformly in the matrices of ductile metals by mechanical alloying (MA). In case that the dispersed oxide is thermodynamically unstable with respect to the matrix metal, the oxide particles act as the oxygen sources, and more stable oxide is formed by the displacement reaction of oxygen. In this work, Cu alloys and magnesium were mechanically alloyed with addition of various metal oxides, and in situ formation of oxide dispersoids was studied in the matrix of Cu and Mg. It is a purpose of this work to obtain high performance materials by effective dispersion strengthening attained by such a process.All the obtained MA powders showed the structures in which fine oxide particles were uniformly dispersed in the matrix of Cu or Mg. In mechanically alloyed Cu alloys containing solute elements whose oxidation tendency is stronger than Cu, the added oxide particles acted as the supply source of oxygen and internal oxidation of solut … More e atoms occurred. In MA of Cu-Zn, Cu-Sn, Cu-Ni and Cu-Al alloys with addition of CuO, the displacement reaction of oxygen took place, thereby ZuO, SnOィイD22ィエD2, NiO, and AlィイD22ィエD2OィイD23ィエD2 were formed by preferential oxidation of the solute elements. Furthermore, when MA was performed for the Cu-Al alloy with additions of ZnO, NiO, and CrィイD22ィエD2OィイD23ィエD2, preferential oxidation of solute Al caused in situ formation of AlィイD22ィエD2OィイD23ィエD2 in the matrices of Cu-Zn, Cu-Ni and Cu-Cr alloys. It has been shown that the P/M materials of high strength can be obtained by applying such internal oxidation processes.In MA of pure Mg with addition of SiOィイD22ィエD2, displacement reaction of oxygen occurred and the in situ formation of MgO and MgィイD22ィエD2Si was confirmed by X ray diffraction. The reaction progressed further by heating the MA powder, and hardness increased were observed along with it. In MA of pure Mg with addition of TiOィイD22ィエD2, complex oxide MgTiOィイD23ィエD2 was formed by heating of the MA powders. However, decomposition of ZrOィイD22ィエD2 was not observed after heating of the MA powders of Mg-ZrOィイD22ィエD2. In the bulk material of Mg-SiOィイD22ィエD2 prepared by vacuum hot press, the hardness reached HV162 due to internal oxidation. Less

通过机械合金化（MA）可以将硬脆氧化物颗粒均匀地分散在韧性金属基体中。在分散的氧化物相对于基质金属是化学不稳定的情况下，氧化物颗粒充当氧源，并且通过氧的置换反应形成更稳定的氧化物。在这项工作中，铜合金和镁的机械合金化添加各种金属氧化物，并在原位形成的氧化物弥散体中的铜和镁的基体进行了研究。本工作的目的是通过这种方法获得有效的弥散强化来获得高性能材料。所有获得的MA粉末都显示出细小的氧化物颗粒均匀分散在Cu或Mg基体中的结构。在含有氧化倾向比Cu强的溶质元素的机械合金化Cu合金中，添加的氧化物颗粒作为氧的供应源和溶质的内氧化， ...更多信息原子发生了。在Cu-Zn、Cu-Sn、Cu-Ni和Cu-Al合金中加入CuO后，发生了氧的置换反应，溶质元素优先氧化生成ZuO、SnO_（22）O_（23）O此外，当对添加ZnO、NiO和Cr的Cu-Al合金进行MA时，溶质Al的优先氧化导致在Cu-Zn、Cu-Ni和Cu-Cr合金基体中原位形成Al_（22）O_（23）O_（24）D_2。X射线衍射分析表明，在纯Mg中加入SiO_2 O_3D_2D_2Si后，发生了氧的置换反应，原位生成了MgO和Mg_2 O_3D_2Si。通过加热MA粉末，反应进一步进行，硬度沿着增加。在纯镁的MA中添加TiOイD22 D2，通过加热MA粉末，形成复合氧化物MgTiOイD23 D2。然而，在加热Mg-ZrO_xD_22·xD_2的MA粉末之后，未观察到ZrO_xD_22·xD_2的分解。在真空热压法制备的Mg-SiO_2D_2D_2块体材料中，由于内氧化，硬度达到HV 162。少