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Accession number;05A0297535
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| Title;Development of High Strength Alumina Ceramics by Spark Plasma Sintering (Part 2) (Effect of Milling Media Purity on Densification and Strength of Alumina Ceramics) |
| Author;
YAJIMA YOICHI
(Ind. Res. Inst. of Nagano)
YAMAGUCHI TOMOHIRO
(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.24;PAGE.1-7(2004)
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| Figure&Table&Reference;FIG.9, TBL.2, REF.23 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Alumina ceramics were densified at sintering temperatures of 1250-1550.DEG.C. by spark plasma sintering (SPS) using transition alumina powder of mixed phases of .GAMMA.- and .CHI.-alumina prepared from polyhydroxoaluminum (PHA) gel. The starting high-purity powder (HP) was obtained by grinding the alumina powder with a planetary ball mill using a high-purity alumina (purity: 99.9%) pot and balls to prevent contamination derived from the abrasion powder worn during the milling. The HP thus obtained realized full densification at sintering temperatures 50-100.DEG.C. lower than those of the corresponding lower-purity powder (LP), which was obtained by grinding with a planetary ball mill using a 93%-pure alumina pot and 99.9%-pure alumina balls. The HP could also provide alumina ceramics with higher bending strengths (approximately 860 MPa) than those obtained using LP. (author abst.) |
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