{"title":"si-al-o-n陶瓷单相的合成","authors":"護 三友, 信行 倉元, 正幸 堤, 弘茂 鈴木","doi":"10.2109/JCERSJ1950.86.999_526","DOIUrl":null,"url":null,"abstract":"(1) “Balanced” powder mixture of Si3N4, AlN and Al2O3 for sialon (Si6-zAlzOzN8-z with z=1, 2, 3 or 4) was hot pressed at 1750°C for 1h under 200kg/cm2. The densification was incomplete in a sialon with z=1. Other sialons were pore free.(2) The reactions included in the process of β-sialon formation were inferred to be, (a) the formation of 15 R-sialon, x-phase and β-sialon with z=2.3-2.5 at low temperature (equations (2) and (3)), (b) steep densification at higher temperature than 1600°C by “transient liquid phase sintering” with x-phase as a liquid, (c) the final step to approach z value of β-sialon into predicted one (equations (5) and (6)).(3) Density measurement and chemical etching with diluted HF+HNO3 of fracture surface of sialon revealed that there was unreacted materials in sialons with z=3 and 4. A single phase and fully dense sialon was obtained in the composition z=2 with very small amount of grain boundary phase, if any.(4) Small amount of excess oxide (about 3 wt%) in a sialon with z=2, which existed as grain boundary phase, was detected by chemical etching.","PeriodicalId":17274,"journal":{"name":"Journal of the Ceramic Association, Japan","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1978-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"23","resultStr":"{\"title\":\"Si-Al-O-Nセラミックス単相の合成\",\"authors\":\"護 三友, 信行 倉元, 正幸 堤, 弘茂 鈴木\",\"doi\":\"10.2109/JCERSJ1950.86.999_526\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"(1) “Balanced” powder mixture of Si3N4, AlN and Al2O3 for sialon (Si6-zAlzOzN8-z with z=1, 2, 3 or 4) was hot pressed at 1750°C for 1h under 200kg/cm2. The densification was incomplete in a sialon with z=1. Other sialons were pore free.(2) The reactions included in the process of β-sialon formation were inferred to be, (a) the formation of 15 R-sialon, x-phase and β-sialon with z=2.3-2.5 at low temperature (equations (2) and (3)), (b) steep densification at higher temperature than 1600°C by “transient liquid phase sintering” with x-phase as a liquid, (c) the final step to approach z value of β-sialon into predicted one (equations (5) and (6)).(3) Density measurement and chemical etching with diluted HF+HNO3 of fracture surface of sialon revealed that there was unreacted materials in sialons with z=3 and 4. A single phase and fully dense sialon was obtained in the composition z=2 with very small amount of grain boundary phase, if any.(4) Small amount of excess oxide (about 3 wt%) in a sialon with z=2, which existed as grain boundary phase, was detected by chemical etching.\",\"PeriodicalId\":17274,\"journal\":{\"name\":\"Journal of the Ceramic Association, Japan\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1978-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"23\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the Ceramic Association, Japan\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.2109/JCERSJ1950.86.999_526\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Ceramic Association, Japan","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.2109/JCERSJ1950.86.999_526","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
(1) “Balanced” powder mixture of Si3N4, AlN and Al2O3 for sialon (Si6-zAlzOzN8-z with z=1, 2, 3 or 4) was hot pressed at 1750°C for 1h under 200kg/cm2. The densification was incomplete in a sialon with z=1. Other sialons were pore free.(2) The reactions included in the process of β-sialon formation were inferred to be, (a) the formation of 15 R-sialon, x-phase and β-sialon with z=2.3-2.5 at low temperature (equations (2) and (3)), (b) steep densification at higher temperature than 1600°C by “transient liquid phase sintering” with x-phase as a liquid, (c) the final step to approach z value of β-sialon into predicted one (equations (5) and (6)).(3) Density measurement and chemical etching with diluted HF+HNO3 of fracture surface of sialon revealed that there was unreacted materials in sialons with z=3 and 4. A single phase and fully dense sialon was obtained in the composition z=2 with very small amount of grain boundary phase, if any.(4) Small amount of excess oxide (about 3 wt%) in a sialon with z=2, which existed as grain boundary phase, was detected by chemical etching.