Thermal expansion behavior of copper matrix composite containing negative thermal expansion PbTiO_3 particles

摘要

PbTiO3 ceramic exhibits large negative coefficient of thermal expansion in a wide temperature range. Here, we demonstrate that PbTiO3 particles is an effective filler to adjust the thermal expansion of coppermatrix composite. The PbTiO3/Cu composites in the present study are prepared by spark plasma sinteringmethod. The addition of PbTiO3 particles effectively reduces the coefficient of thermal expansion of the composite. The negative and decreasing thermal expansion of PbTiO3 particles suppresses the thermal expansion of Cu matrix with temperature increasing, which leads to low and stable coefficient of thermal expansion of the composite. (C) 2017 Elsevier Ltd. All rights reserved.