The metal is used as a binder for an oxide, boride, or carbide. Boron arsenide also occurs as subarsenides, including the icosahedral boride BAs. The higher boride LnB is known for all lanthanide metals. Aluminum magnesium boride or BAM is a chemical compound of aluminium, magnesium and boron. FeB. On to this iron boride coating is deposited cobalt using a pack cementation process. As expected for a boride, it has a high melting point. With Henri Moissan, Stock discovered silicon boride. To prevent this reaction, the carbon fibers are coated with nickel or titanium boride. On heating with diborane, uranium hydride produces uranium boride. Thus magnesium boride has been proposed as fuel in ram jets. Most borided steel surfaces will have iron boride layer hardnesses ranging from 1200-1600 HV. Cobalt boride is also an effective hydrogenation catalyst used in organic synthesis. These include boride hydrides, carbohydrides, hydridonitrides, oxyhydrides and others. Nickel boride is in the form of black amorphous powder or black granules.