Effect of processing conditions on the characteristics of pores in hot isostatically pressed alumina
Effect of processing conditions on the characteristics of pores in hot isostatically pressed alumina
复制标题
加工条件对热等静压氧化铝孔隙特性的影响
DOI：
10.1007/bf00595746
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发表时间：
1993
影响因子：
4.5
通讯作者：
A. Miyamoto
中科院分区：
文献类型：
--
作者：
K. Uematsu;M. Sekiguchi;J. Y. Kim;K. Saito;Y. Mutoh;M. Inoue;Y. Fujino;A. Miyamoto
利用光学显微镜研究了不同工艺条件对热等静压半透明氧化铝陶瓷残余孔隙特征的影响。分别在1300、1400和1600℃进行等静压坯体烧结，然后在低于烧结温度50℃的条件下，在100 MPa下进行热等静压1 h。所有试样均在实验精度（±0.1%）范围内致密，晶粒尺寸随烧结/热等静压温度的升高而增大。在所有的样品中都发现了各种各样的孔隙。孔隙在试样内各部位分布均匀。随着孔隙尺寸的增大，孔隙数量逐渐减少，但在超过84 μm的范围内，孔隙数量有限。随着烧结/热等静压温度的升高，该范围内的孔隙增多。除这些大孔隙外，各处理条件下孔隙数量基本一致。
Effect of processing conditions on the characteristics of residual pores was studied with an optical microscope in hot isostatically pressed translucent alumina ceramics. Green bodies formed by isostatic pressing were sintered at 1300, 1400 and 1600°C and then hot isostatically pressed at a temperature 50°C below the respective sintering temperature for 1 h at 100 MPa. All specimens were fully dense within experimental accuracy (±0.1%), and the grain size increased with increasing sintering/hot isostatic pressing temperatures. A variety of pores were found in all specimens. The distribution of pores was uniform at various locations within the specimen. The pore population decreased with increasing pore size, but was finite in the size range exceeding 84 μm. The pores in this range increased with increasing sintering/hot isostatic pressing temperature. Except for these large pores, the pore population was similar under all processing conditions.