王海宁
,
郑永平
,
康飞宇
无机材料学报
利用压汞法和图像分析法研究了膨胀石墨的孔结构,压汞法可测量膨胀石墨中微米量级以下的孔隙结构参数,对微米量级以上的孔可以利用图像分析法进行测量,膨胀石墨制备参数对膨胀石墨的孔结构有显著影响,其中插层电量越大孔径尺寸越大,孔径分布越宽;膨化温度越高,孔径尺寸越大,孔径分布也越宽。
关键词:
膨胀石墨
,
mercury porosimetry
,
image analysis
,
pore structure
J.M. Gong
,
S.T. Tu
,
J. Xia and X. Ling (School of Mechanical Engineering
,
Nanjing University of Chemical Technology
,
Nanjing 210009
,
China)
金属学报(英文版)
Creep deformation localization is generally found in structures at high temperamture,typically in weldments. As the heat affected zone (HAZ) in a weldment is very narrow, deformation in HAZ region can hardly be measured by conventional displacement gauge. A new method for measuring long-term local creep deformation was developed by quartz optical fiber and technique of digital image analysis. The creep deformations of base metal, weld metal and HAZ in weldments are thereby determined with crossweld specimens.
关键词:
creep deformation
,
null
,
null
,
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