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What I don't think we could live without is clutch / shifter.
The other viewpoint is my perspective on the Mustang that I want:
I WANT a V6 model. And people are going nuts. "No man, you need the V8".
The truth is, I drive REALLY REALLY fast. But even in my driving, I would never, maybe rarely, use more than the 220hp that the V6 delivers. What does the car take to run at 100 mph ? 170 hp ? What's the difference if there is a V6 under the hood or a V8 ? All that horsepower - I'll almost never use it. But the $8000 difference, the extra 90 miles out of a tank of gas, I'll use that all day long.
The Clutch and shifter has been slowy fazzed out over the past 30+ years. There are two generations that were not tought how to drive a standard transmission in drivers ed. Go to a local highschool I am sure more then 75% would say they do not know how to drive a manual car an if they where given the choice between 2 identical cars other then transmission, they would take the automatic. In america, fewer and fewer cars come with manual transmissions. Look at almost all trucks, SUV's, full size sedans and minivans. They are all basicly standard in automatics with no option other then sport shifting modes. Mercedes Benz are almost completely automatics here in america. Basicly the only cars that ARE offered with manual transmissions are either economy cars (honda cars, foci, cobalts, ect) or sports cars (bmw's, porsches, mustangs, vettes, roadsters, ect). Between the two groups are a much larger segment of cars. Even the most high end sports cars are slowly going to sequential transmissions because shifting speeds are becoming faster and faster with sequential boxes. I love standard transmissions but america doesn't. Europe and Japan are diffrent stories (in the same way they have K-cars and other cool small cars) where 95% of the cars you see will be manual transmissions.
As for v6/v8 debate, any car today including minivans can do 100mph and it doesn't really take much hp to run at that speed, the diffrence is just how long it takes you to get there.
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Finally
Modern engines are already a high nickel content. .
This is true there are high nickel contents, however, they are still aluminum based. Super Nickel alloys are Nickel based with around 60wt% nickel and the other 40wt% of up to 10 other alloying metals so there melting tempatures are MUCH higher then an aluminum based alloy. Turbines of Jet engines are typically made of this and can withstand tempature as high as 1200*c while staying extremly strong.
The biggest problem in extremly high tempature environments is corrosion rates increase and high tempature creep. A Super Alloy resists both making them a great canidate for an extreamly lean (like maybe 20:1, 30:1, air:fuel ratios)
Bonding that Nickel to the tool steel to take the stress requires other layers of metals that bond.
As for this statement
Are you trying to talk about thin film deposition?