激光辐射氧化锆-锆英石制品表面的显微结构演变

发布时间：2018-04-24 19:48

  本文选题：激光辐射 + 氧化锆重结晶　； 参考：《耐火材料》2016年01期

【摘要】：为研究激光与氧化锆制品表面的作用,采用半导体激光器以700 W功率辐照非均态Zr O2-Zr Si O4定径水口试样表面,致其表面局部熔融。借助场发射扫描电镜观察激光辐射前后试样的显微结构变化,利用XRD分析相组成,并用EDS测定化学组成。结果表明:在激光扫描过的区域,烧结氧化锆熔融并重结晶成微米晶体,取向连生成团聚体;而锆英石颗粒全部分解成以树枝晶为特征的m-Zr O2和玻璃相,在局部液相中可见纳米级的m-Zr O2析晶因激剧的m囹t相变而开裂成微粒。
[Abstract]:In order to study the effect of laser on the surface of zirconia products, the surface of non-uniform Zr O2-Zr Sio _ 4 diameters was irradiated by a semiconductor laser at 700W power, resulting in local melting of the surface. The microstructure of the samples before and after laser irradiation was observed by field emission scanning electron microscope (SEM). The phase composition was analyzed by XRD and the chemical composition was determined by EDS. The results show that sintered zirconia melts and recrystallizes into micron crystals in the laser-scanned region, and the zircon particles are decomposed into dendritic m-Zr O 2 and glass phase. Nanocrystalline m-Zr O2 can be found in the local liquid phase to crack into particles due to the sharp m cell phase transition.
【作者单位】： 濮阳濮耐高温材料(集团)股份有限公司北京研发中心;中钢集团洛阳耐火材料研究院有限公司;深圳市天光玻璃有限公司;
【分类号】：TQ174.1
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本文编号：1797979