Description:
All aspects of materials engineering.
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Selective etch of SiO2 over SiCr
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Hi, Does anyone know of a good selective etch (either dry or wet) that etches SiO2 (or SiNx) but stops on SiCr (or other thin film resistor materials such as WSi2)? Will BOE work? thanks Erji
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Why not Butanol?
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Hi all, I've been reading about Butanol. Butanol seems to have great advantages over ethanol, but all the information looks like it's single source and just regurgitated on many websites. I'm looking for a chemist or someone with technical expertise, to tell me why it has not jumped to the forefront and become the alcohol of... more »
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Sputtering of Cr film
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Hi, I am having issues with magnetron sputtering of Cr. The chamber and the film seems to have coloration after depositing the film at 3 mTorr and a DC power of 50-100 W. Since the Cr film should look like a nomal metal (no color), I am looking to find solution to this issue. Also, can anybody help me in understanding the drift in the manometer... more »
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Massive Social Upheaval Ain't Always Pretty
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...For a _short_ time I wondered if "he" might be posting under two names. Then I realized that peak oil has spawned an epidemic of confused folk. Now the duo are flaming each other which proves the latter more reasoned conclusion. You are looking at nothing less than the face massive social upheaval.... more »
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Strong glue to hold metal sheets
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Hi I am looking for glue which can hold the metal sheet together and further the sheets can be tested under compression without de- laminating or failure (20% strain). I have tried GB Weld and it is not working good. I want to glue 4 sheets (0.6'* 0.6') of 2 mm thickness. Thanks A
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Cable strand broken
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Dear group members, i have encountered one problem and need to analyzed it before taking any preventive action. Contorl cable (1/8", 7X19, steel cable) strands wires were found broken in the area where it run overs pulleys (phenolic). I have came to know that these area are critical to fatigue but couldnt figured... more »
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ZEBRA electric school bus
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...If they cycle thousands of times then they are already competitive with liquid hydrocarbon fuel in a lot of applications. Bret Cahill
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Giuen Interpose & Outright Company
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A New Generation Outright Company begun in 2008 the funding for a battlefield data link that projected data onto a computer screen inside for example vehicles and inside the tanks. A system mated up with vehicle sets permanent to the base top-of-the-line included in the Inter-Vehicle Information System, a simple system for trading... more »
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300 kW EV Tractor vs 400 hp Diesel
 
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The Tesla is powered by 7,000 Li-Ion laptop batteries for an output of 200 kW. A similarly powered 300 kW electric tractor (10,500 batteries) would turn a 400 hp articulated 22 gallon/hour diesel tractor every which way but loose in a tractor pull which apparently is vitally necessary education as well as entertainment for those too ignorant do basic... more »
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EV - Trolly Bus for Route Flexibility
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A trolly bus would not need a rapid discharge battery to greatly expand it's route flexibility. For long periods of time the trolly line is charging a conventional battery while moving along its main route. If you believe batteries are mythical things, please start another thread. Bret Cahill
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