Friction and Wear of TiB2

One of the major uses of TiB2 is as a wear-resistant material. For such applications, the friction and wear characteristics represent limiting benchmarks on the performance and durability of the material. In general, these characteristics are system properties rather than material properties. They are functions of the temperature and loading conditions, the atmospheric and lubricating environments, the topological characteristics, and the relative sliding speed of the interacting surfaces. However, in assessing the potential relative performance of materials in tribological applications, it is useful to know the friction and wear behavior of one specimen sliding against another of the same material without lubricating substances. The coefficient of friction varies somewhat with temperature, with an apparent minimum occurring for temperatures near 800 °C. The quantitative differences between the results of the two references are probably the result of different operating conditions in the two ring-on-block experiments. The coefficient of friction appears to have a power law dependence on the ratio of the sliding speed vs. and the contact stress Pc. At 800 °C, the friction coefficient is about 0.2 when vs./Pc ≈ 0.06. In Ref., the contact stresses were not reported, but the load ranged from 0.25 N to 29.4 N (25 g to 3 kg). Hence, the apparent contact stress for the reported specimen dimensions was 1.4 kPa to 0.17 MPa, indicating that vs./Pc was in the range (0.36 to 0.003) m · s−1 · MPa−1, though not conclusive. for vs/Pc = 0.2 m · s−1 · MPa−1, the coefficient of friction may be taken to be 0.8±0.1 for temperature less than or equal to 400 °C and 0.4±0.1 for temperature in the range 800 °C to 1000 °C. If you are looking for high quality, high purity, and cost-effective Titanium diboride, or if you require the latest price of Titanium diboride, please feel free to email contact mis-asia.

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