scholarly journals FEASIBILITY STUDY ON QUALITY VERIFICATION OF CASTED CONCRETE USING NONDESTRUCTIVE AIR PERMEABILITY TEST AND ELECTRIC RESISTIVITY MEASUREMENT TOWARD RADIOACTIVELY CONTAMINATED WASTE DISPOSAL

2015 ◽  
Vol 69 (1) ◽  
pp. 287-294 ◽  
Author(s):  
Isao KURASHIGE ◽  
Kazuo YAMADA ◽  
Shoichi OGAWA
Keyword(s):  
Feasibility Study ◽  
Waste Disposal ◽  
Resistivity Measurement ◽  
Air Permeability ◽  
Electric Resistivity ◽  
Permeability Test ◽  
Contaminated Waste ◽  
Electric Resistivity Measurement

scholarly journals Plasma Oxidation Printing into DLC and Graphite for Surface Functionalization

2019 ◽  
Vol 5 (1) ◽  
pp. 11 ◽  
Author(s):  
Tatsuhiko Aizawa ◽  
Kenji Wasa ◽  
Yoshiro Nogami
Keyword(s):  
Surface Functionalization ◽  
Screen Printing ◽  
Stainless Steel Substrate ◽  
Steel Substrate ◽  
Resistivity Measurement ◽  
Electric Resistivity ◽  
Plasma Oxidation ◽  
Vertically Aligned ◽  
Electric Resistivity Measurement ◽  
Density Plasma

A diamond-like carbon (DLC) film, coated on a AISI420-J2 stainless steel substrate and vertically aligned graphite (VAG), was structured by high-density plasma oxidation to work as a DLC-punch for micro-stamping and DLC-nozzle array for micro-dispensing, in addition to acting as a copper-plated thermal spreader, respectively. Thick DLC films were micro-patterned by maskless lithography and directly plasma-etched to remove the unmasked regions. Thick VAG (Ca plates were micro-patterned by screen-printing and selectively etched to activate the surface. Raman spectroscopy as well as electric resistivity measurement proved that there was no degradation of VAG by this surface activation. Wet plating was utilized to prove that copper wettability was improved by this surface treatment.

Method of Designing Bentonite/Sand Mixture to Achieve the Target Permeability

1994 ◽  
Vol 353 ◽  
Author(s):  
Hitoshi Nakashima ◽  
Takashi Ishii ◽  
Tatsuro Nagasawa ◽  
Nobuhide Ogata ◽  
Hideo Komine
Keyword(s):  
Radioactive Waste ◽  
Waste Disposal ◽  
Void Ratio ◽  
Radioactive Waste Disposal ◽  
Permeability Test ◽  
Sand Mixture ◽  
Compaction Test ◽  
Disposal Facility ◽  
Effective Component ◽  
Effective Void Ratio

AbstractBentonite/sand mixture is expected to be an effective component of barriers for radioactive waste disposal facility. Impermeable mixture can be obtained through enrichment of the bentonite content,but it is difficult to estimate a permeability of bentonite/sand mixture before permeability test. At designing of bentonite/sand mixture, we have to decide which sand to be used, and what bentonite content is. But.this means that designing will be a time-consuming task. In this report, we made many kinds of bentonite/sand mixtures using some kinds of sand with different bentonite content, and permeability tests were conducted for these mixtures. After examination of the permeability tests results, the effective void ratio of bentonite/sand mixture which was obtained by compaction test, is an efficient parameter for estimation of the permeability. Last of all, we propose the method of designing bentonite/sand mixture using the effective void ratio.

Effect of Homogenization on Recrystallization of Twin Roll Cast AA3003 Alloy

2013 ◽  
Vol 404 ◽  
pp. 122-126
Author(s):  
Yi You Tu ◽  
De Zhong Zhang
Keyword(s):  
Annealing Temperature ◽  
Volume Fraction ◽  
Resistivity Measurement ◽  
Optical Microscope ◽  
Intermetallic Particles ◽  
Temperature Homogenization ◽  
Homogenization Temperatures ◽  
Twin Roll Cast ◽  
Twin Roll ◽  
Electric Resistivity Measurement

The effect of homogenizations on the recrystallization microstructure of as-rolled twin roll cast AA3003 alloy were investigated using optical microscope, scanning electron microscopy and electric resistivity measurement. The results indicate that high temperature homogenization significantly decrease the supersaturation of Mn in the alloy, and both the volume fraction and the diameter of intermetallic particles increase as the homogenization temperatures. The shape of the recrystallized grains changes from pancake-like to equiaxed, as the annealing temperature increases above 520°C.

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