METHOD OF DETERMINING DIFFUSION COEFFICIENT IN POWDER MATERIALS AND METHOD OF DETERMINING THICKNESS AND INDEX OF COATING INTEGRITY ON PARTICLES OF POWDER MATERIALS
- 专利权人:
- ROSSIJSKAJA FEDERATSIJA, OT IMENI KOTOROJ VYSTUPAET GOSUDARSTVENNAJA KORPORATSIJA PO ATOMNOJ EHNERGII "ROSATOM";FEDERAL'NOE GOSUDARSTVENNOE UNITARNOE PREDPRIJATIE "ROSSIJSKIJ FEDERAL'NYJ JADERNYJ TSENTR-VSEROSSIJSKIJ NAUCHNO-ISSLEDOVATEL'SKIJ INSTITUT EHKSPERIMENTAL'NOJ FIZIKI"-FGUP "RFJATS-VNIIEHF"
- 发明人:
- MOKRUSHIN VALERIJ VADIMOVICH,TSAREV MAKSIM VLADIMIROVICH
- 申请号：
- RU20120157832
- 公开号：
- RU2522757(C1)
- 申请日:
- 2012.12.27
- 申请国别(地区):
- 俄罗斯
- 年份:
- 2014
- 代理人:
- 摘要：
FIELD: chemistry.SUBSTANCE: in a method of diffusion coefficient determination electroconductivity of a material in an initial state is measured to determine initial content of a diffusant in a coating on its particles. After that, the material in bulk is subjected to diffusion annealing, cooled, and electroconductivity is measured to determine the changed content of the diffusant in the coating. Measurement of the material electroconductivity before and after annealing is carried out with a different degree of compression, also, before and after annealing determined are the coating thickness and an index of its integrity, which are taken into account in measuring the change of the diffusant content in the coating with a constant value of its concentration, a diffusion coefficient is determined by an expression, obtained by solution of the Fick equation. The said sequence of actions is repeated at different temperatures of the material annealing to obtain a temperature dependence of the diffusion coefficie
- 来源网站：
- 中国工程科技知识中心
