A quantitative method for characterizing the surface failure of nonmetallic single crystals under sliding was evaluated. It was found that strain rate, load, and slider design influenced the wear of natural fluorapatite single crystals. High loads and slider designs with small radiuses and sharp angles resulted in the deepest penetration.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/67060/2/10.1177_00220345720510011201.pd
