Development of High Strength Alumina Ceramics by Spark Plasma Sintering.
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Accession number;03A0820488
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| Title;Development of High Strength Alumina Ceramics by Spark Plasma Sintering. |
| Author;
YAJIMA YOICHI
(Ind. Res. Inst. of Nagano)
HIDA MASAHIRO
(Shinshu Univ., Fac. Engineering, JPN)
TARUTA SEIICHI
(Shinshu Univ., Fac. Engineering, JPN)
KITAJIMA KUNIO
(Shinshu Univ., Fac. Engineering, JPN)
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Journal Title;Naganoken Kogyo Shikenjo Kenkyu Hokoku
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Journal Code:Y0010A
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ISSN:0913-672X
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VOL.;NO.23;PAGE.20-25(2003)
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| Figure&Table&Reference;FIG.7, TBL.2, REF.20 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;.GAMMA.-Alumina powders were prepared from polyhydroxoaluminum-polyvinylalcohol (PHA-PVA) composite gels by calcining and then grinding by a planetary ball mill. Using the .GAMMA.-alumina powders thus obtained, alumina ceramics were densified by spark plasma sintering (SPS). The sintered compact obtained by SPS had a high density of more than 99% of theoretical density. The use of a single phase of .GAMMA.-alumina powders made the densification temperature shift to lower temperatures, as compared with the use of sample powders consisting of .GAMMA.- and .CHI.-alumina. The inclusion of fine a-alumina particles, which were derived from wet grinding abrasion powders with wearing in planetary ball milling, had also a significant effect on densification due to a seeding effect, lowering the .GAMMA.- to a-alumina transformation temperature. The bending strength of sintered compact fired at 1350.DEG.C. reached a value as high as 850MPa. (author abst.) |
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