Sputtering processes which take place in the presence of reactive hydrocarbon gases will produce coatings consisting of sputtering target compounds embedded in amorphous hyrogenated carbon (a-C:H). The a-C:H matrix is also commonly known as diamond like carbon (DLC). For processing with low levels of acetylene flow, coatings with enhanced hardness have been produced. For higher levels of acetylene flow tribological investigations have shown decreased friction coefficients. Coatings with the best wear properties are those which optimize hardness, strength, and friction coefficient. To investigate the fundamental nature of the coating hardness, adhesive strength, and cohesive strength, indentation experiments have been performed with four different Boron Carbide/DLC coatings on steel substrates. Coatings were were approximately 1.5 microns thick and have been characterized with SEM, TEM, and Raman spectroscopy. Indentations were made at nano, micro, macro loads. Nano and micro-indentations provide information relating to the hardness and modulus of the different coating compositions. This information was used interpret crack patterns produced by higher load micro and macro-indentation. Observations were made with optical microscopy, optical profilometry, and SEM.