of aluminum in excess of that of the substrate metal to compensate for the fact that aluminum was not present in the tlp alloy ingredient throughout the description emphasis has been placed on the use of boron as the temperature depressant in connection with the repair of the high strength high temperature alloys such as the nickel cobalt and iron base superalloys boron is normally advantageously used silicon however is another element that is recognized to have a temperature depressant effect boron is normally utilized since in those substrate alloy systems any substantial quantities of borides that are found may in most instances be readily eliminated by heat treatment whereas silicides or other similar compounds may not in particular alloy systems or in other circumstances where for one reason or another the borides cannot be reasonably eliminated and particularly where the component will be exposed to a hot oxidizing environment the presence of the silicide rather than the boride may be advantageous since the silicide is more oxidation resistant this would normally be an exceptional circumstance however since typically homogenization would be most desirable usually the repair powder mix is simply placed in the cavity to be filled a series of tests however have revealed that it is possible to pile the dry powders over the cavity and to flow them into the cavity in the slurry or partially liquefied state at high temperature care must be taken however that all of the unmelted base metal powder particles necessary for isothermal solidification in reasonable time frames are not filtered out in the process in other words a mix of unmelted powders and liquid and not simply liquid itself is desired in the cavity another technique that has been employed has involved a powder mix presintering.