Alumina composites with solid lubricant participations, sintered by SPS-method
Piotr Putyra, Paweł Figiel, Marcin Podsiadło, Piotr Klimczyk
Quarterly No. 2, 2011 pages 107-110
DOI:
keywords: alumina, SPS sintering, hardness, density, Young Modulus, friction coefficient
abstract The paper presents the sintering results of Al2O3-Ti(C,N) ceramics with the additions of solid lubricant materials. Al2O3 Ti(C,N) based ceramics with solid lubricating substances were sintered by the SPS- method. In the phase known as lubricants, the following materials were used: MoS2, WS2, CaSO4, SrSO4 and MoO3 and CaO. The Al2O3-Ti(C,N) ceramics were also prepared with the addition of TiB2. The SPS-sintered materials were characterized by values of relative density from 93 to 99%. In the case of the addition of 10 and 30% TiB2, the relative density, Young's modulus and hardness HV1 were close or equal to the values of the base material. For other additions, the Young's modulus ranged from 74 to 83% and hardness from 62 to 76% of the Young’s modulus and hardness value for the base material. Regardless of the additive or its volume, the fraction of the friction coefficient was 49 to 86% of the friction coefficient value for the base material. Taking into account the value of the friction coefficient and the physical and mechanical properties, the most promising material is a ceramic with the addition of TiB2 or MoO3 with CaO.