Konopka K
Warsaw University of Technology, Faculty of Materials Science and Engineering, Warszawa 02-507 ul. Wołoska 141, Poland.
J Microsc. 2006 Sep;223(Pt 3):285-7. doi: 10.1111/j.1365-2818.2006.01654.x.
This paper is concerned with ceramic matrix (Al(2)O(3)) composites with introduced metal particles (Ni, Fe). The composites were obtained via sintering of powders under very high pressure (2.5 GPa). Scanning electron microscopy and transmission electron microscopy were chosen as the tools for the identification and description of the shape, size and distribution of the metal particles. The Al(2)O(3)-Ni composite contained agglomerates of the Ni particles surrounded by ceramic grains and nanometre-size Ni particles located inside the ceramic grains and at the ceramic grain boundaries. In the Al(2)O(3)-Fe composite, the Fe particles were mostly surrounded by ceramic grains. Moreover, holes left by the Fe particles were found. The high pressure used in the fabrication of the composites changed the shape of the metal and ceramic powder grains via plastic deformation.
本文关注的是引入金属颗粒（镍、铁）的陶瓷基（氧化铝）复合材料。这些复合材料是通过在极高压力（2.5吉帕）下对粉末进行烧结而获得的。选择扫描电子显微镜和透射电子显微镜作为工具，用于识别和描述金属颗粒的形状、尺寸和分布。氧化铝 - 镍复合材料包含被陶瓷晶粒包围的镍颗粒团聚体以及位于陶瓷晶粒内部和陶瓷晶界处的纳米尺寸镍颗粒。在氧化铝 - 铁复合材料中，铁颗粒大多被陶瓷晶粒包围。此外，还发现了铁颗粒留下的孔洞。复合材料制造过程中使用的高压通过塑性变形改变了金属和陶瓷粉末颗粒的形状。
