铸造工程
鑄造工程
주조공정
FOUNDRY ENGINEERING
2012年
4期
8-12
,共5页
机械合金化%非晶粉末%添加剂%析晶活化能%低压烧结
機械閤金化%非晶粉末%添加劑%析晶活化能%低壓燒結
궤계합금화%비정분말%첨가제%석정활화능%저압소결
mechanical alloying%amorphous powder%additives%activation energy%low pressure sintering
以商业纯元素粉末为原料，用机械合金化方法在低真空条件下合成了以非晶态为主的Zr50Al15Ni10Cu25粉末。研究了一定量的外界添加剂C、Si3N4和SiC对体系热稳定性和晶化行为的影响。混合粉末用手工预压成形，然后在氩气氛下进行低压烧结。利用X射线衍射（XRD）、扫描电镜（SEM）、差热分析（DSC）和电子拉伸实验机对粉末样和块状样进行了测试。结果表明，合适的外界添加剂可以提高体系的析晶活化能，增强体系的热稳定性。适量的Si3N4能促进Zr50Al15Ni10Cu25非晶粉末的低压烧结性能，即有助于提高样品的烧结致密度和样品的抗弯强度。
以商業純元素粉末為原料，用機械閤金化方法在低真空條件下閤成瞭以非晶態為主的Zr50Al15Ni10Cu25粉末。研究瞭一定量的外界添加劑C、Si3N4和SiC對體繫熱穩定性和晶化行為的影響。混閤粉末用手工預壓成形，然後在氬氣氛下進行低壓燒結。利用X射線衍射（XRD）、掃描電鏡（SEM）、差熱分析（DSC）和電子拉伸實驗機對粉末樣和塊狀樣進行瞭測試。結果錶明，閤適的外界添加劑可以提高體繫的析晶活化能，增彊體繫的熱穩定性。適量的Si3N4能促進Zr50Al15Ni10Cu25非晶粉末的低壓燒結性能，即有助于提高樣品的燒結緻密度和樣品的抗彎彊度。
이상업순원소분말위원료，용궤계합금화방법재저진공조건하합성료이비정태위주적Zr50Al15Ni10Cu25분말。연구료일정량적외계첨가제C、Si3N4화SiC대체계열은정성화정화행위적영향。혼합분말용수공예압성형，연후재아기분하진행저압소결。이용X사선연사（XRD）、소묘전경（SEM）、차열분석（DSC）화전자랍신실험궤대분말양화괴상양진행료측시。결과표명，합괄적외계첨가제가이제고체계적석정활화능，증강체계적열은정성。괄량적Si3N4능촉진Zr50Al15Ni10Cu25비정분말적저압소결성능，즉유조우제고양품적소결치밀도화양품적항만강도。
The multicomponent Zr50Al15Ni10Cu25 amorphous alloy powders were prepared with purity raw materials by mechanical alloying method in low vacuum conditions. The effects of some external additives, such as C, Si3N4 and SiC powders on thermal stability and crystallization behavior of the Zr50Al15Ni10Cu25 amorphous alloy were investigated. The preformed bars from blended powders by oil hydraulic press were sintered in an atmosphere sintering furnace under 10 MPa argon pressure. The samples were characterized by XRD, SEM, DSC and tensile properties measurement. The results suggested that the activation energy of Zr50Al15Ni10Cu25 amorphous alloy could be enhanced when appropriate foreign particles are doped to the matrix, and the system of thermal stability is improved. A certain amount of Si3N6 addition can improve the sintering property and mechanical properties of the matrix in low pressure sintering process.
