Ar离子辐照的非晶态合金表面发泡扫描电镜观测

Abstract

１５０、１９５和３００ｋｅＶＡｒ离子在室温下辐照非晶态合金Ｃｏ７０．２Ｆｅ３．９Ｎｂ３．９Ｓｉ１４Ｂ８和Ｃｏ６６Ｆｅ４．５Ｖ２．２５Ｎｉ２．２５Ｓｉ１０Ｂ１５，扫描电镜在一定的辐照剂量范围观测到了表面发泡形成，发泡形成的临界剂量和直径随离子能量增加而增加。Ａｒ离子能量高于１９５ｋｅＶ时，发泡和发泡破裂是主要的表面损伤现象，而在１５０ｋｅＶＡｒ离子辐照下，未观测到发泡破裂。使用Ａｒ离子的聚集、临界气压的建立和气体从近表面的释放解释了表面发泡效应。Surface blistering of the amorphous alloys Co70.2Fe3.9Nb3.9Si14B8and Co66Fe4.5V2.25Ni2.25Si10B15 due to argon ion bombardment at energies of 150,195 and 300 keV has been observed with a scanning electron microscope(SEM).The critical dose for onset of blistering and the blister diameter are determined and found to increase with increasing projectile energy. Above about 195 keV, blisters and rupture of blisters are the predominant surface damage phenomena. However,at 150 keV, there is no evidence of cracked国家自然科学基金,甘肃省自然科学基金,中国科学院重点基