The phase relationship in the Fe–Pb–Sb ternary system at 500 K

The phase relationship of the Fe–Pb–Sb ternary system at 500 K has been studied mainly by means of X-ray powder diffraction with the aid of differential thermal analysis and optical microscope. There are three three-phase regions, five two-phase regions and five single-phase regions in this ternary system at 500 K. No ternary compounds were found.     

Phase Equilibrium in the Ni-Ti-Zr System at 800 °C

The isothermal Ni-Ti-Zr phase diagram at 800 °C was constructed by means of 50 equilibrated alloys. Electron microprobe analyses were used to determine the phase compositions and phase relationships. There is one ternary phase Ni(Ti,Zr)₂ formed in the central region. Most of the Ni-Ti and Ni-Zr binary intermetallic phases show a large Zr or Ti solubility and extend to the ternary region. According to the results of DTA measurements, there are lower liquidus regions around the ternary phase due to the ternary phase reactions with the binary intermetallic phases. There is a potential region to form the bulk metallic glass.     

PHASE DIAGRAM OF Nd-Fe-B TERNARY SYSTEM——I.Isothermal Section at Room Temperature

The microstructures of both as-cast and homogenized Nd-Fe-B ternary alloys have beenstudied. The stable phase regions existing in Nd-Fe-B ternary system at room temperaturehave been established by the microzone composition analysis and the phase identification.Based on the obtained results, an isothermal section of Nd-Fe-B ternary system at roomtemperature was drawn.     

Room Temperature Section of Al-In-Sn Ternary Phase Diagram

The X-ray powder diffraction method was used to determine the room temperature section of Al-In-Snternary phase diagram.The section consists of 5 single-phase regions,7 two-phase regions and 3 three-phaseregions.The structure of In_3Sn phase is known to be tetragonal with a=0.3445 nm,c=0.4436 nm.     

700℃ ISOTHERMAL SECTION OF THE Pd-Ru-Gd PARTIAL PHASE DIAGRAM

The 700℃ isothermal section of the Pd-Ru-Gd partial ternary phase diagram containing more palladium than ruthenium was determined by X-rag diffraction analysis and optical microscopy. The section consists of seven single-phase regions,eleven two-phase regions and five three-phase regions. A new ternary compound Pd2RuGd2,which exhibits a tetragonal structure with a=0.7492 nm and c=0.7445 nm, has been found.     

Experimental phase diagram of the Ti-Si-Sn ternary system at 473 K

The phase diagram of the ternary system Ti-Si-Sn system at 473 K was investigated by means of powder X-ray diffraction (XRD), differential thermal analysis (DTA) and scanning electron microscope (SEM) with energy dispersive analysis (EDX). The isothermal section consists of 14 single phase regions, 26 binary phase regions and 13 ternary phase regions. The 10 binary compounds, namely Ti₃Si, Ti₅Si₃, Ti₅Si₄, TiSi, TiSi₂, Ti₃Sn, Ti₂Sn, Ti₅Sn₃, Ti₆Sn₅, Ti₂Sn₃, have been confirmed at 473 K. Moreover, a ternary phase with the crystal structure of tetragonal W₅Si₃ structure type and I4/mcm space group is confirmed in the Ti-Si-Sn system. The combined results of both EDX and XRD show that the composition of this ternary phase is 60.25-61.03 at.% Ti, 15.01-21.77 at.% Si and balance Sn.     

The isothermal section of the Er–Fe–Sb ternary system at 773 K

The phase relation of the Er–Fe–Sb ternary system at 773 K has been investigated mainly by means of X-ray powder diffraction with the aid of optical microscopy and differential thermal analysis. This section consists of 12 single-phase regions, 22 two-phase regions and 11 three-phase regions. A ternary compound Er₆FeSb₂ has been confirmed.     

La-Ni-Cr三元系600℃等温截面的相关系

用X射线粉末衍射法，差热分析法和金相分析法测定了La-Ni-Cr三元系600℃等温截面的相关系。结果表明：此截面由10个单相区、17个两相区和8个三相区组成。在本实验条件下未发现新的三元化合物，没有观察到化合物Cr，Ni3和Cr3Ni2的谱线；化合物La3Ni的谱线是由La和La7Ni3的谱线相叠加；没有观察到LaNi2，而观察到La7Ni16的存在。Ni在Cr中的最大固溶度大约为3at％，Cr在Ni，LaNi5，La2Ni7，LaNi3，La2Ni3，LaNi和La7Ni3中的最大固溶度(at%)分别约为35，20，15，8，9，9和6，Cr在La7Ni16中的固溶度几乎为零。     

410℃ ISOTHERMAL SECTION OF Al-Cu-Sb PHASE DIAGRAM

The 410℃ isothermal section of the phase diagram of Al-Cu-Sb ternary system has been de-termined by means of X-ray powder diffraction method and electron probe microanalysis.The section determined consists of 12 single-phase regions,21 bi-phase regions and 10tri-phase regions.     

ROOM TEMPERATURE AND 750℃ ISOTHERMAL SECTION OF Ag-Pd-Gd(Gd≤25 AT.-%)PHASE DIAGRAM

The room temperature section and the 750℃ isothermal section of the Ag-Pd-Gd ternaryphase diagram containing 0—25 at.-% Gd are constructed by X—ray diffraction analysis andoptical microscopy.Each section consists of 3 single phase regions,3 bi-phase regions and Itri-phase region respectively.     

Isothermal section of Al–Ti–Zr ternary system at 1073 K

Through alloy sampling combined with diffusion triple technique, phase equilibria in Al–Ti–Zr ternary system at 1073 K were experimentally determined with electron probe microanalysis (EPMA). Experimental results show that there is a solid solution β(Ti,Zr) which dissolves Al up to 16.3% (mole fraction). Ti and Zr can substitute each other in most Ti–Al and Al–Zr binary intermediate phases to a certain degree while the maximum solubility of Zr in Ti₃Al and TiAl reaches up to 17.9% and 4.0% (mole fraction), respectively. The isothermal section consists of 16 single-phased regions, 27 two-phased regions and 14 three-phased regions. No ternary phase was detected.     

Phase equilibria of Zn-Al-Ti ternary system at 450 and 600 °C

The phase relationships in the Zn-Al-Ti system at 450 and 600 °C were experimentally determined using equilibrated alloys method. The specimens were investigated by means of scanning electron microscopy coupled with energy dispersive spectroscopy and X-ray diffractometry. Eleven and eight three-phase regions are confirmed in the 450 and 600 °C isothermal sections, respectively. The Ti₂Al₅ which only exists at high temperature (990-1199.4 °C) in Ti-Al binary system is confirmed in two isothermal sections due to the dissolution of zinc. The T phase is confirmed as a ternary compound rather than an extension phase of TiZn₃ at 450 °C. The T₂ phase is a new ternary phase stable at 450 and 600 °C in Zn-Al-Ti ternary system.     

Nb—Ti—Si三元系1473K等温截面的测定

运用扩散偶技术结合电子探针微区成分分析方法对Nb-Ti-Si三元扩散偶进行相分析，测得Nb-Ti-Si三元系1473K下所生成的7个扩散层，分别是TiSi2,TiSi,Ti5Si3,Nb5Si2和M3Si，此扩散偶中未发现三元化合物，并根据扩散偶中的相区分布和相图中相区分布的关系，得出Nb-Ti-Si三元系1473K下的等温截面。     

Mg-Sn-Y三元系富Mg角500℃等温截面的测定

采用合金法,利用XRD、SEM-EDS测定一系列Mg-Sn-Y三元合金在500℃下富Mg角处相平衡关系及各相平衡成分,建立Mg-Sn-Y三元系在500℃下富Mg角处的等温截面相图。结果表明:Mg-Sn-Y三元系富Mg角处存在Mg2Sn、MgSnY、Sn3Y5和Mg24+xY54种化合物与α-Mg固溶体平衡,从而构建3个三相区和4个两相区;Sn在α-Mg基体中的固溶度为2.5%～3.9%(摩尔分数),Y在α-Mg基体中的固溶度为1.1%,但二者不能同时固溶到α-Mg基体中,同时Sn3Y5相中大约可以固溶3.6%～4.1%的金属Mg;由于MgSnY和Sn3Y5等一些高熔点化合物在高温下能够稳定存在,使得Mg-Sn-Y体系有可能成为一种潜在的新型耐热镁合金。     

Subsolidus phase relations in the ZnO-WO3-Bi2O3 system

The subsolidus phase relations of the ternary system ZnO-WO₃-Bi₂O₃ were investigated by means of X-ray diffraction (XRD). Six binary compounds and seven 3-phase regions were determined, and no ternary compounds were found in this ternary system. The phase diagram of pseudobinary system ZnO-Bi₂WO₆ was also constructed through XRD and differential thermal analysis (DTA) methods, which forms eutectic system with eutectic temperature about 945 °C, the corresponding eutectic component is 35 mol% ZnO and 65 mol% Bi₂WO₆.     

Subsolidus phase relation in the system ZnO–Li2O–MoO3

The subsolidus phase relation of the system ZnO–Li₂O–MoO₃ has been investigated by X-ray diffraction (XRD) analyses. The phase diagram has been constructed. There are six binary compounds and one ternary compound in this system. The phase diagram comprises nine three-phase regions. The ternary compound Li₂Zn₂(MoO₄)₃ is refined by the Rietveld method. It belongs to an orthorhombic system with space group Pnma and lattice constants a = 5.1114 Å, b = 10.4906 Å, c = 17.6172 Å.     

Phase Equilibria of the Al-Rich Corner in the Al-Cu-Fe-Si System at 650 °C

Phase equilibria in the isothermal section of the Al-Cu-Fe-Si quaternary system with Al being fixed at 85 at.% and the related ternary subsystems at 650 °C have been investigated by scanning electron microcopy coupled with energy dispersive spectroscopy and x-ray diffraction. Two four-phase regions are identified in the isothermal section of the Al-Cu-Fe-Si quaternary system. Three three-phase regions and two three-phase regions are found in Al-rich corner of Al-Fe-Si and Al-Cu-Fe, respectively, and the Al-rich corner of the Al-Cu-Si system contains only the liquid phase. No new ternary and quaternary compounds are found in the present work.     

Phase relations in the SrO–Ga2O3–B2O3 system

The subsolidus phase relations in the SrO–Ga₂O₃–B₂O₃ system were investigated. The system contains 10 binary compounds and two ternary compounds, and can be divided into 15 three-phase regions. The new ternary compound SrGaBO₄ has two modifications (- and β-phases), both of which crystallize in the orthorhombic system but with different space groups.