EFFECT OF HOT PRESSING ON THE ELECTROCHEMICAL PROPERTIES OF Ti-Ni ALLOY

被引：2

作者：

Balcerzak, M. ^{[1
]}

Jurczyk, M. ^{[1
]}

机构：

[1] Poznan Univ Tech, Inst Mat Sci & Engn, Poznan, Poland

来源：

ARCHIVES OF METALLURGY AND MATERIALS | 2015年 / 60卷 / 02期

关键词：

mechanical alloying; hot pressing; SEM; XRD; electrochemical measurements; HYDROGEN-STORAGE; MORPHOLOGY;

D O I：

10.1515/amm-2015-0126

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Ti2Ni alloy pellets were produced by mechanical alloying and hot pressing at 750 degrees C for 0.5 h in vacuum. X-ray diffraction analysis showed that, after 8 h of milling, a starting mixture of elements mostly decomposed into an amorphous phase. Obtained powders and flakes have cleavage fracture morphology with huge number of dimples with different sizes. Hot pressing of materials caused formation of Ti2Ni main phase. Porosity of pellets strongly depended on size of agglomerates and pressure of pressing. Ti2Ni pellets were used as negative electrodes for Ni-MHx batteries. Maximum measured discharge capacity of studied materials was 220 mAh/g. Electrochemical properties resulted from size of agglomerates, degree of oxidation and pressure of pressing.

引用

页码：1335 / 1340

页数：6

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