Micro-indentation hardness variation as a function of composition for polycrystalline solutions in the systems PbS/PbTe, PbSe/PbTe, and PbS/PbSe
Micro-indentation hardness variation as a function of composition for polycrystalline solutions in the systems PbS/PbTe, PbSe/PbTe, and PbS/PbSe
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DOI：
10.1007/bf00550400
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发表时间：
1969-04
影响因子：
4.5
通讯作者：
M. S. Darrow;W. B. White;R. Roy
中科院分区：
文献类型：
--
作者：
M. S. Darrow;W. B. White;R. Roy
维氏显微压痕硬度作为组合物的函数已被测量为铅硫族化物系统的多晶溶液和结果相比，出溶倾向所暗示的subsolidus功能的相图。每个系统表现出正偏差的线性硬度之间的关系的端员化合物。对于PbS/PbTe溶液观察到最显著的硬化;最大硬度发生在约30摩尔% PbTe处，与在约30摩尔% PbTe和约805° C处具有溶线最大值（临界点）的大溶解度间隙一致。对于PbS/PbSe系统观察到最少量的硬化，其在低至300° C的温度下不显示出溶。硬度与组成的关系曲线关于50摩尔%组成近似对称。在这两个系统之间的中间，PbSe/PbTe结晶溶液表现出不对称的硬度/组成曲线，在约30mol%PbTe处具有最大硬度。部分相研究表明，在500至600° C时，在图的PbSe富集侧存在最大固溶线。
Vickers micro-indentation hardness as a function of composition has been measured for polycrystalline solutions of lead chalcogenide systems and results compared to exsolution tendencies as implied by subsolidus features of the phase diagrams. Each system exhibited a positive deviation from a linear hardness relation between the end member compounds. The most pronounced hardening was observed for PbS/PbTe solutions; the maximum hardness occurs at about 30 mole % PbTe, coincident with a large solubility gap with a solvus maximum (critical point) at about 30 mol % PbTe and approximately 805° C. The least amount of hardening was observed for the system PbS/PbSe, which exhibits no exsolution at temperatures as low as 300° C. The hardness versus composition curve was approximately symmetric about the 50 mol % composition. Intermediate between these two systems, the PbSe/PbTe crystalline solutions exhibited an asymmetric hardness/composition curve with maximum hardness at about 30 mol % PbTe. Partial phase studies indicate the possibility of a solvus maximum at 500 to 600° C on the PbSe-rich side of the diagram.