【摘 要】
:
In this work equilibrated alloys were utilized with the help of scanning electron microscope equipped with dispersive X-ray spectroscope and X-ray power diffraction to determine the phase relations of
【机 构】
:
School of Materials Science and Engineering, Xiangtan University, Xiangtan, 411105,Hunan, China;Key
【出 处】
:
第十七届全国相图学术会议暨相图与材料设计国际研讨会
论文部分内容阅读
In this work equilibrated alloys were utilized with the help of scanning electron microscope equipped with dispersive X-ray spectroscope and X-ray power diffraction to determine the phase relations of the Fe-Al-Ce ternary system at 600℃.The results show that fifteen three-phase regions have been found in the 600℃ section.Six ternary phases have been identified in this section, namely, ψ-CeFe2All0、 ψ 2-CeFe2Al7、 ψ3-CeFe4Al8、 ψ5-Ce5Fe4Al6, and the ψ4 and ψ6 phases should be determined in future study.
其他文献
The compositional window in Nb-Ni-Ti alloys leading to the crystallization of primary α-Nb phase and the eutectic (α-Nb + NiTi) phase is of high technical relevance due to its favorable properties wit
A low-doped binary hydrogen generation material, Al-BiC13 composite, with high capacity and activity of H2 released have been successfully prepared by ball milling.The hydrogen yield, the conversion e
磁制冷技术是一种极具开发潜力的制冷技术,长期以来具有优异性能的磁制冷材料一直作为人们研究的热点.近年来,Mn基合金及其化合物的磁热效应逐渐受到人们的关注.对Mn2Sb1-xSnx化合物巨磁阻效应的研究也有报道.关于Mn基三元合金相图的研究,迄今为止还没有Mn-Sb-Sn三元系合金的等温截面报道.本实验用高纯度的Mn (99. 5%)、Sn (99. 9%)和Sb (99. 9%)金属作为原材料,在
综合利用X射线粉末衍射(XRD)分析、场发射扫描电子显微镜(FESEM)显微分析和能谱(EDS)分析等方法对Mn-Al-Sb三元系合金相图773 K时的相平衡关系进行了实验测定.结果表明,该截面由11个单相区、20个两相区和9个三相区组成,没有观察到三元金属间化合物存在.
利用扫描电镜和能谱仪,分析研究了熔池中镁对热浸镀45%Al-Zn的镀层组织的影响.实验表明:镁的加入使镀层在生长过程中形成周期性的层状FeAl3,本文对该结构的形成机理作了初步探讨.熔池中镁的加入不能使得基体界面上出现类似于含硅镀层的连续、致密、稳定的二元或三元相。镁不能有效抑制Fe-Al间的剧烈反应,含镁镀层仍出现超厚生长现象。但镀层厚度随镁含量的增加而逐渐减小。在实验研究范围内,在含镁(≥0.
The Nb-Zn system has been thermodynamically investigated within the CALPHAD approach by combining available experimental data and the data from ab initio calculations of the formation enthalpies for N
氧化钇稳定氧化锆(YSZ)是目前使用最广泛的热障涂层(TBC)陶瓷材料,但当温度高于1200℃时,YSZ由于相变会产生体积变化,降低涂层的热循环寿命.HfO2-La2O3体系中烧绿石结构的La2Hf2O7具有良好的物理化学性能,如较低的热导率、高熔点以及良好的高温相结构稳定性,使其具有成为新型TBC材料的潜力.因此,HfO2-La2O3体系的相平衡关系和热力学性质将为La2Hf2O7新型TBC材料
本文采用高温熔炼的方式,经过放电等离子烧结(SPS)制备了Na0.02BaxPb1-xTe0.5Se0.5系列样品.Na掺杂抑制了BaxPb1-xTe0.5Se0.5体系随着温度升高发生的p型向n型的转变,调节了载流子浓度.Ba掺杂提高了材料的Seebeck系数,降低了热导率,同时提升了材料的功率因子,使得Na0.02(Ba0.06Pb0.94)0.98Te0.5Se0.5在723K时热电优值取得
高通量的扩散多元节(diffusion multiple)方法极大地提高了相图测定的效率,为完善材料热力学数据库提供大量必需的基础实验结果.本文通过扩散多元节方法(diffusion multiple)制备Ti-TiAl-Cr-Hf-Mo-Nb-V-Zr扩散多元节试样,结合扫描电镜(SEM)与电子探针(EPMA)等分析检测技术,初步测定了Ti-Al-Mo三元系在1200℃、1100℃、1000℃、
The Ag-Cu-Ge system was modeled using the CALPHAD (CALculation of PHAse Diagram) technique.Solution phases, liquid, fcc and hcp in the Ag-Cu-Ge ternary system, was modeled as (Ag, Cu,Ge) using the sub