ThreeTreeDog

Good day, night whatever the case may be. I am looking for some collab on getting a couple housings worked. I have a couple unusable ones and am going to strip the ch/mo coating and then apply a NiSiC layer. Im not familiar with the CNC aspect of this process. Would the tooling and such be the same as the original material, as in could I send this to a company that already does resurfacing and it not be a issue? Been waiting 3 days on just getting someone to answer a email on getting the regular work done to 2... I would hate to ask them for anything more complicated..

dannobre

iTrader: (3)

You are heading into an area that has had numerous attempts and a lot of dissappintment

You will likely have to do a lot of trial and error.

The crome coating is applied to a.metal liner that is integrated into the cast aluminum housing... so it is not so easy to just remove it and add an aluminum bonded layer like you can on piston cylinders.

Hate to be a downer but you will need to do a lot more than 2 to even come close to figuring out something that might work

ThreeTreeDog

Yes I have done some research into it and most threads tapper off with inconclusiveness but there has to be a way to apply a differnet material through plating and spec to original dimentions. Nikisil can be electroplated to Al or Fe so Im unsure as to what the issues would be (I assure you I will lol). As I understand it NiSiC can be applied to around 180um thickness so the remainder of the fill could be Copper or Nickel I would imagine. Im no expert in any of these processes, but I think a viable alternative process to Mazda's CrMo is acheivable. I may just start with removing the CrMo from a couple (im sure there is no short supply of crap housings) and reapplying to others, but would love to find a alternative material. A couple years ago in Material Science I read a article describing a electroplatable alloy of Palladium?/Platinum/Gold, I know very expensive but it was a very thin layer like 5 microns I beleive, that had really low friction, hardness, high thermal conductivity, and crazy wearability almost indestructable.

dannobre

iTrader: (3)

The reason for the chrome is the porosity that hold the oil fim to keep the seals from wearing..

ThreeTreeDog

Yes, but if those parts are sufficiently lubricated, Im not necissarily talking about oil, the coating would not need the porosity. Like say if the wear surface were impregnated with nanospheres (specifically I was thinking silicon carbide 50um, (calcium 50um?) in a Ni plate. Looking for similar results as Anderson Manufacturing RF85 treatment, but actually built into the composite itself (as they do with their weapons manufacturing) but Im not sure that is a process that can be acheived through electroplating. If its not going to cost a arm and leg Im going to send some housings and hard seals to them to try out, after all they have been using it in race engines for years.

dannobre

iTrader: (3)

There are lots of us that hope it works... keepnus posted

ThreeTreeDog

This is the alloy I was talking about, took a while to find. Reading through this is demanding but electroless deposition or electroplating deposition is my interest not the sputtering depostion as demonstrated here. It says it can be deposited on virtually any metal substrate, see the list of elements. I know its platinum and gold, expensive but we are only dealing with a 10nm to 100nm layer. In a anoxic environment (no oxygen) and here I am assuming a lubricant rich environment preventing O from reaching the layer that still applies, its a self healing coating (grows a diamond like carbon layer). With a sub 60nm grain boundry size. Stable to 500 C as well.
https://app.dimensions.ai/downloads/...US-10763000-B1

It appears it is a Pt 90% Au 10% alloy, looks like min grain size of 7.9nm after annealing at 500C (but not required to exhibit superior mechanical properties vs any other)