Composites of NiTi2-TiB have been fabricated using spark plasma sintering and mechanical properties have been investigated. Dense specimens of monolithic NiTi2 have been obtained by the sintering at 950?C. By the x-ra...Composites of NiTi2-TiB have been fabricated using spark plasma sintering and mechanical properties have been investigated. Dense specimens of monolithic NiTi2 have been obtained by the sintering at 950?C. By the x-ray diffraction measurements it has been shown that NiTi2 co-exists with TiB in equilibrium at 950?C. The bending strength of NiTi2-TiB composite increases with increasing the volume fraction of TiB2 up to 60 vol%. The maximum bending strength of 730 MPa has been obtained for NiTi2-60vol% TiB2. The Vickers hardness also increases with increasing the volume fraction of TiB up to 70% and the highest Vickers hardness of 1620 Hv has been obtained for NiTi2-70%TiB.展开更多
文摘Composites of NiTi2-TiB have been fabricated using spark plasma sintering and mechanical properties have been investigated. Dense specimens of monolithic NiTi2 have been obtained by the sintering at 950?C. By the x-ray diffraction measurements it has been shown that NiTi2 co-exists with TiB in equilibrium at 950?C. The bending strength of NiTi2-TiB composite increases with increasing the volume fraction of TiB2 up to 60 vol%. The maximum bending strength of 730 MPa has been obtained for NiTi2-60vol% TiB2. The Vickers hardness also increases with increasing the volume fraction of TiB up to 70% and the highest Vickers hardness of 1620 Hv has been obtained for NiTi2-70%TiB.
