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ELECTRICAL PROPERTIES OF MATERIALS FOR ELEVATED TEMPERATURE RESISTANCE STRAIN GAGE APPLICATION.

机译:用于耐高温应变计的材料的电学性能。

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摘要

The objective of this research is to study the electrical resistances of materials that are potentially useful as resistance strain gages at 1000;The resistivities of the transition metal compounds increased and their TCRs and electrical stabilities decreased with an increase in the vacancy concentrations. The resistivity saturated at about 1000 microohm-cm, for resistivities larger than 1000 microohm-cm, negative TCR were observed.;The TCR of stoichiometric transition metal nitrides decreased monotonically in going from compounds of metal of group VI to those of group V then to those of group IV of the period table. Also the TCR of transition metal nitrides and carbides with transition metals in the same column of the period table decreased as quantum number of the transition metal increased. Carbides had lower TCR than the corresponding nitrides.;The change in resistance of B;A set of criteria were set and used in selection of strain gage candidate materials that are electrical stable and reproducible at all temperatures up to the operating temperature (1000;The decrease in resistance with increase in temperature was faster in ;Due to their low TCR and good stability, TiC, ZrC, B
机译:这项研究的目的是研究可能用作1000电阻应变计的材料的电阻;随着空位浓度的增加,过渡金属化合物的电阻率增加,其TCR和电稳定性降低。电阻率在1000微欧-厘米左右饱和,对于大于1000微欧-厘米的电阻率,观察到负TCR .;化学计量的过渡金属氮化物的TCR从VI类金属化合物到V组金属化合物,然后变为周期表第IV组的那些。而且,随着过渡金属的量子数增加,元素周期表的同一列中的过渡金属氮化物和碳化物与过渡金属的TCR也会降低。碳化物的TCR低于相应的氮化物。; B的电阻变化;设定了一组标准,并用于选择在整个工作温度(1000°C)下均稳定且可重现的应变计候选材料。 TiC,ZrC,B具有较低的TCR和良好的稳定性,因此随着温度的升高,电阻的降低更快;

著录项

  • 作者

    LEI, JIH-FEN.;

  • 作者单位

    Northwestern University.;

  • 授予单位 Northwestern University.;
  • 学科 Materials science.
  • 学位 Ph.D.
  • 年度 1987
  • 页码 275 p.
  • 总页数 275
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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