Hardening and Toughening of ZnS-Ga2S3 Ceramics by Solid-State Reactions.

摘要

We report here the first results of our research on the hardness and toughness of ZnS containing 16 mol % Ga2S3, which is the eutectoid composition. Hot-pressed material of 97 to 99% of theoretical was heat-treated for various times in the temperature range 700 to 790 C to stimulate eutectoid decomposition below the eutectoid temperature (818 C). Hardness and toughness were evaluated by the indentation method. The heat-treated material is significantly harder than pure ZnS, but the fracture toughness is about the same, although there is some evidence that toughness increases at longer reaction times. (JES)