摘要:讨论了Al-TiO2-C系热扩散反应合成铝基复合材料的组织、常温力学性能及其断裂机理。结果表明:当碳、TiO2化学计量比为0时,增强相由αAl2O3和Al3Ti组成;随碳、TiO2化学计量比的增加,碳与Al3Ti中的钛结合生成TiC,Al3Ti逐渐减少;在碳、TiO2化学计量比为1时,Al3Ti基本消失,此时室温下的抗拉强度和伸长率同步提高,分别由274MPa和3.0%上升到351 MPa和6.0%;因Al3Ti与基体的结合强度高于自身断裂强度,拉伸时首先自身萌生裂纹,并扩展至基体引起断裂,并在Al3Ti四周形成较大韧窝,Al3Ti不利于强度的进一步提高。
注:因版权方要求,不能公开全文,如需全文,请咨询杂志社
热门期刊服务
Neural Regeneration Research Rare Metals Journal of Rare Earths Cell Research Journal of Integrative Agriculture Hepatobiliary Pancreatic Diseases International Hepatobiliary Pancreatic Diseases International International Journal of Minerals Metallurgy and Materials Journal of Earth Science Acta Geologica Sinica Acta Metallurgica Sinica Acta Geologica Sinica