SiC/Ti50Cu28Ni15Sn7塊狀金屬玻璃基複合材料之製備與特性研究

Formation of Ti-based Bulk Metallic Glass Composites Containing SiC Particles

鄭義冠(I.K. Jeng) ； 李丕耀(P.Y. Lee)

《材料科學與工程》 37卷4期 (2005/12) Pp. 224-229

https://doi.org/10.6409/JMSE.200512.0224

摘要

本研究以機械合金法製備體積比爲4、8、12%之SiC/Ti-Cu-Ni-Sn金屬玻璃基複合材料粉末，並以眞空熱壓成型技術將此粉末壓製成塊狀金屬玻璃基複合材料，經由X-ray繞射分析結果顯示在6小時的球磨後，粉末的繞射圖譜只顯現代表非晶質相之寬廣繞射峰但SiC強化相的結晶峰型卻未出現，然SEM與TEM結果則顯示SiC由原粒徑80~200μm大小碎裂成20~1500nm並均勻分佈於非晶與納米晶混合型態的基地中；另由DSC分析顯現SiC的添加會改變Ti50Cu28Ni15Sn7金屬玻璃基複合材料粉末的熱性質。在塊材製備方面，以眞空熱壓法可成功製備出直徑10mm、厚度4mm的SiC/Ti-Cu-Ni-Sn塊狀金屬玻璃基複合材料。硬度量測顯現當SiC添加至12%時，硬度值可由未添加的630Hv提高至887Hv，透過阿基米德量測之塊材密度經與理論密度值比較後，其相對密度均高達94%以上。

關鍵字

機械合金法 ； 塊狀金屬玻璃基複合材料 ； 眞空熱壓成型 ； 玻璃轉換溫度

並列摘要

The preparation of Ti50Cu28Ni15Sn7 metallic glass composite powders was accomplished by mechanical alloying of pure Ti, Cu, Ni, Sn and SiC for 18 ks. In the ball-milled composites, initial SiC particles were homogeneously dispersed in the Ti-based alloy glassy matrix. The metallic glass composites powders were found to exhibit a large supercooled liquid region just below crystallization temperature. The presence of SiC nanoparticles did not change the glass formation ability of amorphous Ti50Cu28Ni15S7 powders. The as-milled Ti50Cu28Ni15Sn7 and composite powders were consolidated by vacuum hot pressing into disc compacts with a diameter and thickness of 10 and 4 mm respectively. Bulk metallic glass composite with submicron SiC particles homogeneously embedded in a highly dense nanocrystalline/amorphous matrix was successfully prepared. A significant hardness increase with SiC additions was noticed for consolidated composite compacts.

並列關鍵字

Mechanical alloying ； Bulk metallic glass composite ； Supercooled liquid region ； Ti-based alloys ； Nanoparticles