Diamond Like Carbon

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Big Tea
88
Joined: Sun Dec 24, 2017 7:57 pm

Re: Diamond Like Carbon

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Anyone with an interest in this may like this
and the follow on next Wednesday.

He has a slight speech impediment, but CC is available if you have trouble.

It is mostly glossing through and twice as long as it needs to be but prob still worth the 20 min
One test is worth a thousand expert opinions

TimW
TimW
1
Joined: Thu Aug 01, 2019 6:07 pm

Re: Diamond Like Carbon

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Cold Fussion wrote:
Sun Jun 21, 2020 5:37 pm
humble sabot wrote:
Wed Jun 10, 2020 7:48 am
It's been very common on f1 cam shafts as well.
The nicest thing about it is that it's harder than most low friction coatings, even Ti nitride. The hardness of the coating only gets you so far, the rest of the system has to be well engineered too.
Do these coatings change the material hardness significantly? I would have thought the hardness would be more a function of the base material since the nano coatings are so thin.
Depends on the scale (scale as in size) you are measuring on. Micro scale hardness will increase dramatically (e.g. scratch resistance), but large scale hardness would hardly be affected (so same as base material hardness,
hammer would leave same size dent).

I guess exactly as you thought it would be.

User avatar
Andres125sx
338
Joined: Tue Aug 13, 2013 9:15 am
Location: Madrid, Spain

Re: Diamond Like Carbon

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Big Tea wrote:
Sat Jun 27, 2020 7:56 pm
Anyone with an interest in this may like this
Indeed, very good video explaining everything, from composition to current problems and aplications =D> =D>

Cold Fussion
Cold Fussion
137
Joined: Sun Dec 19, 2010 3:51 am

Re: Diamond Like Carbon

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TimW wrote:
Sat Jun 27, 2020 8:42 pm
Cold Fussion wrote:
Sun Jun 21, 2020 5:37 pm
humble sabot wrote:
Wed Jun 10, 2020 7:48 am
It's been very common on f1 cam shafts as well.
The nicest thing about it is that it's harder than most low friction coatings, even Ti nitride. The hardness of the coating only gets you so far, the rest of the system has to be well engineered too.
Do these coatings change the material hardness significantly? I would have thought the hardness would be more a function of the base material since the nano coatings are so thin.
Depends on the scale (scale as in size) you are measuring on. Micro scale hardness will increase dramatically (e.g. scratch resistance), but large scale hardness would hardly be affected (so same as base material hardness,
hammer would leave same size dent).

I guess exactly as you thought it would be.
That makes sense, thanks.

User avatar
strad
268
Joined: Sat Jan 02, 2010 12:57 am

Re: Diamond Like Carbon

Post

Wear factor is what I would be concerned with and the slipperiness . The mentioned Teflon impregnated pistons were like wet ice on wet ice.
To achieve anything, you must be prepared to dabble on the boundary of disaster.”
Sir Stirling Moss