Preparation of porous titanium materials by powder sintering process and use of space holder techniq

来源 :Journal of Iron and Steel Research(International) | 被引量 : 0次 | 上传用户:zhouyulong456
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
It is shown that an adapted powder sintering process can successfully prepare a 24.0%-35.5% porous titanium composite using 20μm Ti powder and rice husk particles ranging in size between 250μm and600μm.The phase constituents of the porous Ti composite samples were determined by X-ray diffraction(XRD)pattern sintered at 1250°C.The generation of silicon in the form of a TiSi_2 solid solution,injected into the substrate,illustrates the solid solution strengthening effect.The average grain size of the tested sample and the grain boundary area increase along with the silicon content.This indicates that silicon is dispersed within the green compact of Ti.As the distance from a hole becomes greater,the nanohardness increases until it reaches a maximum hardness of 3.5GPa at approximately 1.5mm.This may be due to the solid solution strengthening of SiO_2.However,nanohardness is 3.3GPa at a distance of approximately 0.5mm from a hole′s edge.The compressive strength is measured to be in the range of 440-938 MPa.The strain reaches 14.8%-16.6% under compression testing.A large number of cleavage steps appear following a fracture.The observed fracture is a brittle fracture.Porous Ti composites with about 36% porosity have promising potential biomaterial applications,specifically related to bone implants and biological bearings. It is shown that an adapted powder sintering process can successfully prepare a 24.0% -35.5% porous titanium composite using 20 μm Ti powder and rice husk particles ranging in size between 250 μm and 600 μm. The phase constituents of the porous Ti composite samples were determined by X- ray diffraction (XRD) pattern sintered at 1250 ° C. The generation of silicon in the form of a TiSi_2 solid solution, injected into the substrate, illustrate the solid solution strengthening effect. The average grain size of the tested sample and the grain boundary area increase along with the silicon content. This indicates that silicon is dispersed within the green compact of Ti.As the distance from a hole becomes greater, the nanohardness increases until it reaches a maximum hardness of 3.5GPa at approximately 1.5mm. This may be due to the solid solution strengthening of SiO_2.However, nanohardness is 3.3 GPa at a distance of approximately 0.5 mm from a hole’s edge. compressive strength is measured to be in the range of 440-938 MPa. The strain reaches 14.8% -16.6% under compression testing. A large number of cleavage steps appear following a fracture. The observed fracture is a brittle fracture. Porous Ti composites with about 36% porosity have promising potential biomaterials applications, specifically related to bone implants and biological bearings.
其他文献
期刊
期刊
期刊
近日,在日本东京 2017 年国际太阳能光伏展上,杜邦光伏解决方案针对先进丝网印刷推出了新型TM杜邦 Solamet 光伏导电浆料.特别为两次印刷设计的 Solamet PVD1x 和 PVD2x 导电
期刊
期刊
请下载后查看,本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view profile.
期刊
期刊
期刊
  简要介绍世界最长高速铁路丹昆特大桥的基本概况、主要技术标准及丹昆特大桥的主要技术特点及高速铁路桥梁桩基极限摩阻力取值标准,并结合丹昆特大桥的几个典型工点,介绍了