氢气环境对方解石晶体结构参数及显微硬度的影响

中国腐蚀与防护学报

1992, Vol. 12

Issue (1): 34-40

研究报告

本期目录 | 过刊浏览

氢气环境对方解石晶体结构参数及显微硬度的影响

粟启初;E.E.Angino;E.J.Zeller

郑州大学;TheUniversityofKansas;TheUniversityofKansas

THE INFLUENCE OF HYDROGEN GAS ENVIRONMENT ON CRYSTAL PARAMETER AND MICROHARDNESS OF SINGLE CRYSTAL OF CALCITE

Su Qichu (Zhengzhoum University) E. E. Angino and E. J. ZeUer (The University of Kansas)

全文: PDF(1880 KB)

摘要: 观测表明。方解石单晶暴露于0.1～0.4MPa氢气环境2小时后,其Knoop显微硬度值可下降2～8％,原抛光的试样表面可出现微细裂纹、微区破损;随着暴露时间的延长及氢压力的升高,硬度下降的幅度会进一步增高、微裂纹自行扩展、出现解理破裂;与之同时,其晶体参数a、c亦有轻微的减少。大理石、南阳玉、LiF单晶、SiO_2单晶等暴露于氢气后,亦有类似的现象发生。氢气在非金属材料中的扩散所引起的材料强度下降、氢致脆性破坏等现象与金属材料相似,在非金属材料中亦存在氢脆现象;晶体结构参数的变化为认识非金属材料氢脆现象提供了线索。进一步探索其产生的原因及机制是非常必要的。

Abstract：It has been observed that the Knoop microhardness value of single crystals of calcite can be reduced 2 to 8 percents and fine microerack or micro-region break would occur on the polished surfaces of samples after exposure to 0.1 to 0.4 MPa hydrogen gas for 2 hours. The dropping amplitude would increase and traces of microcracks expanding automatically and cleavage fractures occur on the polished surfaces due to extension of exposure time and growth of hydrogen pressure,and crystal parameters, a and c, would decrease slightly at the same time. Similar phenomena were observer for dolomite ,antigorite, LiF and SlO_2 single crystals. Reduction in strength and stress cracking, caused by hydrogen diffusion,imply that hydrogen embrittlement exists in nonmetals as in metals. The changing of crystal structure may provide a clue to the understanding of hydrogen embrittlement in nonmetals,but more detailed study about its causes and mechanism are needed.

收稿日期: 1992-02-25

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引用本文:

粟启初;E.E.Angino;E.J.Zeller. 氢气环境对方解石晶体结构参数及显微硬度的影响[J]. 中国腐蚀与防护学报, 1992, 12(1): 34-40.
. THE INFLUENCE OF HYDROGEN GAS ENVIRONMENT ON CRYSTAL PARAMETER AND MICROHARDNESS OF SINGLE CRYSTAL OF CALCITE. J Chin Soc Corr Pro, 1992, 12(1): 34-40.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1992/V12/I1/34

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