Sintering of nanopowders of amorphous silicon nitride under ultrahigh pressure
文献类型：期刊论文
| 作者 | Li YL ; Liang Y ; Zheng F ; Ma XF ; Cui SJ |
| 刊名 | journal of materials research
 |
| 出版日期 | 2000 |
| 卷号 | 15期号:4页码:988-994 |
| 关键词 | SINTERABLE CERAMIC POWDERS LASER-DRIVEN REACTIONS |
| ISSN号 | 0884-2914 |
| 通讯作者 | li yl |
| 中文摘要 | nanopowders of amorphous silicon nitride were densified and sintered without additives under ultrahigh pressure (1.0-5.0 gpa) between room temperature and 1600 degrees c. the powders had a mean diameter of 18 nm and contained similar to 5.0 wt% oxygen that came from air-exposure oxidation, sintering results at different temperatures were characterized in terms of sintering density, hardness, phase structure, and grain size. it was observed that the nanopowders can be pressed to a high density (87%) even at room temperature under the high pressure. bulk si3n4 amorphous and crystalline ceramics (relative density: 95-98%) were obtained at temperatures slightly below the onset of crystallization (1000-1100 degrees c and above 1420 degrees c, respectively. rapid grain growth occurred during the crystallization leading to a grain size (>160 nm) almost 1 order of magnitude greater than the starting particulate diameters, with the rise of sintering temperature, a final density was reached between 1350 and 1420 degrees c, which seemed to be independent of the pressure applied (1.0-5.0 gpa), the densification temperature observed under the high pressure is lower by 580 degrees c than that by hot isostatic pressing sintering, suggesting a significantly enhanced low-temperature sintering of the nanopowders under a high external pressure. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000086368700024 |
| 公开日期 | 2010-11-04 |
| 源URL | [http://202.98.16.49/handle/322003/19803]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Li YL,Liang Y,Zheng F,et al. Sintering of nanopowders of amorphous silicon nitride under ultrahigh pressure[J]. journal of materials research,2000,15(4):988-994. |
| APA | Li YL,Liang Y,Zheng F,Ma XF,&Cui SJ.(2000).Sintering of nanopowders of amorphous silicon nitride under ultrahigh pressure.journal of materials research,15(4),988-994. |
| MLA | Li YL,et al."Sintering of nanopowders of amorphous silicon nitride under ultrahigh pressure".journal of materials research 15.4(2000):988-994. |
入库方式： OAI收割
来源：长春应用化学研究所
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