Shuai Wang, Qi Zhao, Pengfei Xing, Yanxin Zhuang, Luyao Wang
{"title":"分散剂对热压B4C-YB4陶瓷微观结构和性能的影响","authors":"Shuai Wang, Qi Zhao, Pengfei Xing, Yanxin Zhuang, Luyao Wang","doi":"10.1007/s41779-023-00897-5","DOIUrl":null,"url":null,"abstract":"<div><p>The influence of different dispersants on the dispersion of Y<sub>2</sub>O<sub>3</sub> sintering aid in B<sub>4</sub>C powder and the microstructure and performance of the subsequently hot-pressed ceramics were studied in this paper. The results indicated that ammonium polycarboxylate (APC) could effectively enhance the distribution of Y<sub>2</sub>O<sub>3</sub> in B<sub>4</sub>C powder, and further improve the distribution homogeneity of the formed second phase YB<sub>4</sub> in the fabricated ceramics. Polyethyleneglycol (PEG) 600 was beneficial to breaking the Y<sub>2</sub>O<sub>3</sub> agglomeration in B<sub>4</sub>C powder and improving the distribution of YB<sub>4</sub>. The remaining PEG 600 in the mixed powder would react with B<sub>4</sub>C and Y<sub>2</sub>O<sub>3</sub> particles to form the dendritic-structure second phase in the sintering process, which comprised some whisker-like branches and a layer of film. The distribution of YB<sub>4</sub> in the fabricated ceramics was slightly improved by adding sodium citrate (SC) dispersant. Y<sub>2</sub>O<sub>3</sub> reacted with B<sub>4</sub>C to form the intergranular and intragranular YB<sub>4</sub>, and liquid phase was formed in the sintering process, facilitating the rearrangement of B<sub>4</sub>C grains and improving the densification. The dispersant APC could improve the homogeneity of YB<sub>4</sub>, promoting the densification and strength of the ceramics.</p></div>","PeriodicalId":49042,"journal":{"name":"Journal of the Australian Ceramic Society","volume":"59 4","pages":"1065 - 1077"},"PeriodicalIF":1.9000,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s41779-023-00897-5.pdf","citationCount":"0","resultStr":"{\"title\":\"Influence of dispersant on the microstructure and performance of the hot-pressed B4C-YB4 ceramics\",\"authors\":\"Shuai Wang, Qi Zhao, Pengfei Xing, Yanxin Zhuang, Luyao Wang\",\"doi\":\"10.1007/s41779-023-00897-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The influence of different dispersants on the dispersion of Y<sub>2</sub>O<sub>3</sub> sintering aid in B<sub>4</sub>C powder and the microstructure and performance of the subsequently hot-pressed ceramics were studied in this paper. The results indicated that ammonium polycarboxylate (APC) could effectively enhance the distribution of Y<sub>2</sub>O<sub>3</sub> in B<sub>4</sub>C powder, and further improve the distribution homogeneity of the formed second phase YB<sub>4</sub> in the fabricated ceramics. Polyethyleneglycol (PEG) 600 was beneficial to breaking the Y<sub>2</sub>O<sub>3</sub> agglomeration in B<sub>4</sub>C powder and improving the distribution of YB<sub>4</sub>. The remaining PEG 600 in the mixed powder would react with B<sub>4</sub>C and Y<sub>2</sub>O<sub>3</sub> particles to form the dendritic-structure second phase in the sintering process, which comprised some whisker-like branches and a layer of film. The distribution of YB<sub>4</sub> in the fabricated ceramics was slightly improved by adding sodium citrate (SC) dispersant. Y<sub>2</sub>O<sub>3</sub> reacted with B<sub>4</sub>C to form the intergranular and intragranular YB<sub>4</sub>, and liquid phase was formed in the sintering process, facilitating the rearrangement of B<sub>4</sub>C grains and improving the densification. The dispersant APC could improve the homogeneity of YB<sub>4</sub>, promoting the densification and strength of the ceramics.</p></div>\",\"PeriodicalId\":49042,\"journal\":{\"name\":\"Journal of the Australian Ceramic Society\",\"volume\":\"59 4\",\"pages\":\"1065 - 1077\"},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2023-05-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s41779-023-00897-5.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of the Australian Ceramic Society\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s41779-023-00897-5\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"Materials Science\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Australian Ceramic Society","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s41779-023-00897-5","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Materials Science","Score":null,"Total":0}
Influence of dispersant on the microstructure and performance of the hot-pressed B4C-YB4 ceramics
The influence of different dispersants on the dispersion of Y2O3 sintering aid in B4C powder and the microstructure and performance of the subsequently hot-pressed ceramics were studied in this paper. The results indicated that ammonium polycarboxylate (APC) could effectively enhance the distribution of Y2O3 in B4C powder, and further improve the distribution homogeneity of the formed second phase YB4 in the fabricated ceramics. Polyethyleneglycol (PEG) 600 was beneficial to breaking the Y2O3 agglomeration in B4C powder and improving the distribution of YB4. The remaining PEG 600 in the mixed powder would react with B4C and Y2O3 particles to form the dendritic-structure second phase in the sintering process, which comprised some whisker-like branches and a layer of film. The distribution of YB4 in the fabricated ceramics was slightly improved by adding sodium citrate (SC) dispersant. Y2O3 reacted with B4C to form the intergranular and intragranular YB4, and liquid phase was formed in the sintering process, facilitating the rearrangement of B4C grains and improving the densification. The dispersant APC could improve the homogeneity of YB4, promoting the densification and strength of the ceramics.
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