In situ observation of microstructural changes near the metal-ceramics interface during deformation

变形过程中金属-陶瓷界面附近微观结构变化的原位观察

• 批准号: 60550458
• 负责人: KURODA Kotaro
• 金额: $ 0.26万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550458/
• 关键词: Metal-ceramics interface; Composite materials; Muliphase interface; Microstructure; Transmission electron microsocopy; その場観察

The microstructure near the interfaces between metals and ceramics has been observed by transmission electron microscopy (TEM). Particular attention has been paid to the microstructural changes near the interface during in situ observations using various techniques.Specimens for TEM observations have been prepared by Ar ion-milling. The major problem of specimen preparetion is that the ion-thining rate is quite different between metallic and ceramic materials. The quality of specimens can be improved considerably if the starting specimen discs are mechanically pre-thinned and polised. In order to grind a hemispherical depression in specimens a dimple-grinding device has been made. This device consists of a grinding wheel rotating about a horizontal axis resting on a specimen platform rotating about a horizontal axis. Micron-sized diamond compounds are the grinding medium which is carried by the gringing wheel. X-and Y- micrometer adjustments allow positioning the specimen at the interf … More ace site on cross-sectional specimens.The cross-sectional observations of the microstructure near the metal-ceramics interface have been done on stainless steel-boron nitride, aluminum alloy-silicon nitride, aluminum alloy-silicon carbide and steel-titanium nitride. The microstructure of deformed Al-SiC composites shows dislocation accumulation near the interface in a matrix of aluminum alloy. Dislocation activities are not observed in SiC whiskers. The specimen for in situ straining experiments can be prepared by the following technique. The central area of the specimen is pre-thinned with an ion-milling apparatus. During the pre-thinning, the specimen is rotated. Two parallel dimples (distance 0.5 mm) are next introduced by ion-milling. The specimen is not rotated during this part of the thinning. The distance of the dimples is adjusted by displacing the specimen parallel tothe impining ion beam. The final ion-milling is performed while the specimen is rotated untile small holes is introduced in the area of the two dimples. Dislocation motion induced by stress is observed in situ near the interface in the metal but not in the ceramics. Less

通过透射电子显微镜（TEM）观察了金属和陶瓷之间界面附近的微观结构。使用各种技术进行原位观察期间，特别关注界面附近的微观结构变化。通过 Ar 离子铣削制备了用于 TEM 观察的样品。样品制备的主要问题是金属和陶瓷材料之间的离子稀化率差异很大。如果对起始样品盘进行机械预减薄和抛光，则可以大大提高样品的质量。为了磨削样品中的半球形凹陷，制作了凹坑磨削装置。该装置由绕水平轴旋转的砂轮组成，砂轮放置在绕水平轴旋转的样品平台上。微米级金刚石化合物是砂轮携带的研磨介质。 X 和 Y 千分尺调整允许将样品定位在横截面样品的界面位置。对不锈钢-氮化硼、铝合金-氮化硅、铝合金-碳化硅和钢-氮化钛进行了金属-陶瓷界面附近微观结构的横截面观察。变形Al-SiC复合材料的微观结构显示出铝合金基体界面附近的位错积累。在 SiC 晶须中未观察到位错活动。原位应变实验的样品可以通过以下技术制备。使用离子铣削装置对样品的中心区域进行预减薄。在预减薄期间，样品被旋转。接下来通过离子铣削引入两个平行凹坑（距离 0.5 毫米）。在这部分减薄过程中，样品不旋转。通过平行于撞击离子束移动样品来调整凹坑的距离。最后的离子铣削是在样品旋转的同时进行的，直到两个凹坑区域出现小孔。在金属界面附近原位观察到由应力引起的位错运动，但在陶瓷中却没有。较少的

项目成果

H. Saka, T. Katata, K. Kuroda and T. Imura: "In situ HREM observation of the motion of martensitic interfaces" Proceedings of the 11th International Congress on Electron Microscopy, Kyoto, 1986. 2. 1251-1252 (1986)

H. Saka、T. Katata、K. Kuroda 和 T. Imura：“马氏体界面运动的原位 HREM 观察”第 11 届国际电子显微镜大会记录，京都，1986 年。2. 1251-1252 (1986)

K.Kuroda;T.Kamino;T.Imura: Journal of Electron Microscopy. 35. (1986)

K.Kuroda；T.Kamino；T.Imura：电子显微镜杂志。

K.Sasaki;K.Kuroda;T.Imura;H.Saka;T.Kamino: Journal of Electron Microscopy. 34. 414-418 (1985)

K.Sasaki；K.Kuroda；T.Imura；H.Saka；T.Kamino：电子显微镜杂志。

H.Saka;T.Katata;K.Kuroda;T.Imura: Proceedings of the 11th International Congress on Electron Microscopy,Kyoto,1986. 2. 1251-1252 (1986)

H.Saka；T.Katata；K.Kuroda；T.Imura：第 11 届国际电子显微镜大会论文集，京都，1986 年。

佐々木勝寛,黒田光太郎,井村徹,坂公恭: 窯業協会誌. 94. 773-778 (1986)

Katsuhiro Sasaki、Kotaro Kuroda、Toru Imura、Kimiyasu Saka：《陶瓷协会杂志》94. 773-778 (1986)。