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| 1 | 特殊分相结构对生物微晶玻璃微结构和性能的影响显示文摘以K2O-MgO-Al2O3-B2O3-SiO2-F为基础玻璃体系,按氟磷灰石元素组成向其中添加不同含量的Ca、P和F,配合料经过1500℃高温熔化后在580℃退火处理1.5h,具有特殊分相结构的前躯体玻璃经过两步晶化后得到了不同微观结构与性能的微晶玻璃。X射线衍射和扫描电镜测试结果表明:微晶玻璃的主晶相为片状氟金云母和针状氟磷灰石;随着分相结果的不同,针状磷灰石表现出随机分布和取向聚集分布两种分布形式;在具有磷灰石取向性的样品中,平行于磷灰石c轴方向的可切削性明显低于垂直方向的,而在磷灰石随机分布的微晶玻璃中,可切削性则介于两者之间。 | 张海希 陈晓峰 李玉莉 邓春林 赵娜如 林才 | 2010 | 硅酸盐学报2010，38，12： | 2 |
| 2 | Microstructure and fracture behavior of SiO_2 glass ceramic and TC4 alloy joint brazed with TiZrNiCu alloy显示文摘Vacuum brazing of SiO2 glass ceramic and TC4 alloy using a commercially available TiZrNiCu foil was investigated. The interfacial microstructure and the fractures were examined with an optical microscope(OM) and an S-4700 scanning electron microscope(SEM) equipped with an energy dispersive spectrometer(EDS) and an electron probe X-ray microanalyzer(EPMA) . The structure of joint interface was identified by XRD(JDX-3530M) . Meanwhile,the fracture paths of the joints were comprehensively studied. The results show that processing parameters,especially the brazing temperature,have a significant effect on the microstructure and mechanical properties of joints. The typical interface structure is SiO2/Ti2O+Zr3Si2+Ti5Si3/(Ti,Zr) +Ti2O+ TiZrNiCu/Ti(s.s) /TiZrNiCu+Ti(s.s) +Ti2(Cu,Ni) /TC4 from SiO2 glass ceramic to TC4 alloy side. Based on the mechanical property tests,the joints brazed at 880 ℃ for 5 min has the maximum shear strength of 23 MPa. | 刘多 张丽霞 冯吉才 刘洪斌 何鹏 | 2009 | Journal of Central South University2009，16，5： | 0 |
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