Has there ever been any high carbon stainless steel made with iridium as one of the alloy components? Is there any research in this direction?
There is a paper from 2016 comparing various iridium structures to more well known/studied structures, with the finding that iridium dinitrogen exhibits the highest bulk modulus of any high pressure synthesized compound at 428GPa.
There is also a paper from 2011 studying various physical properties of iridium carbides with various stoichiometries, finding that iridium pentacarbide and iridium tetracarbide (with iridium germanide structures) are potential ultrahard materials.
Has any more work been done in this area, ideally looking towards applications for iridium as a component in high carbon stainless steel alloys?