【摘 要】
:
Titanium diboride based composites, good candidates for contact materials, have high hardness, Youngs modulus,high temperature stability, and excellent electric
【机 构】
:
State Key Lab of Advanced Technology for Materials Synthesis and Processing
【基金项目】
:
Foundation of the State Key Lab-oratory of New Nonferrous Metal Materials, Gansu University of Technology;国家自然科学基金
论文部分内容阅读
Titanium diboride based composites, good candidates for contact materials, have high hardness, Youngs modulus,high temperature stability, and excellent electrical, thermal conductivity. However a good interface of TiB2/Cu is very difficult to achieve for oxidation of TiB2. To avoid this oxidation behavior, the in situ combusting synthesis technology, SHS, was used to prepare TiB2/Cu composite. Thecharacters of Ti-B-xCu SHS were studied in detail,such as combustion temperature, products phases and grain size. Based on the experimental results a proper technology way of self-high temperature synthesis plus quick press (SHS/QP) was determined and compact TiB2/Cu composites with relative density over than 97 pct of the theoretical were fabricated by this method. The properties and microstructures of these TiB2 based composites were also investigated.
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