Microstructure and Mechanical Properties of NiTi<sub>2</sub>-TiB Composite Fabricated by Spark Plasma Sintering

• 作者: Hideo Shiraishi Masashi Yoshida Naoya Ikki
• 来源期刊: 世界工程和技术(英文)
• 学科: 工学
• 关键词: Composite Bending Strength VICKERS Hardness TIB NiTi2
• 年，卷（期）: 2015,（3）
• 页码范围: 84-88
• 页数: 5页
• 分类号: TB3

摘要

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.