The effect of the gas atmosphere on the response of the Al86Ni6Y4.5Co2La1.5 metallic glass powder to heating

IMR OpenIR

	The effect of the gas atmosphere on the response of the Al86Ni6Y4.5Co2La1.5 metallic glass powder to heating
	X. P. Li; M. Yan; J. Q. Wang; M. Y. Lu; G. B. Schaffer; M. Qian
	2012
发表期刊	Intermetallics
ISSN	0966-9795
卷号	30 页码:117-121
摘要	The response of nitrogen gas-atomised fully amorphous Al86Ni6Y4.5Co2La1.5 powder (<25 mu m) to heating in nitrogen and argon from 5 K/min to 40 K/min was investigated using differential scanning calorimetry (DSC), thermogravimetry (TG), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and nano-indentation. The powder showed noticeably lower glass transition temperature, crystallization onset temperature, and peak crystallization temperatures in nitrogen than in argon, particularly at heating rates of >= 30 K/min. The activation energy for the onset of crystallisation of the powder was determined to be 301.58 +/- 42.47 kJ/mol in nitrogen compared to 418.18 +/- 7.20 kJ/mol in argon. Experimental evidence confirmed the reaction between the amorphous Al86Ni6Y4.5Co2La1.5 powder and nitrogen at >= 360 degrees C or even from similar to 280 degrees C. The powder that crystallized in nitrogen exhibited slightly but consistently higher hardness and elastic modulus. These results are necessary to inform the selection of the sintering atmosphere and parameters for the fabrication of bulk metallic glass of Al86Ni6Y4.5Co2La1.5 from powder. (C) 2012 Elsevier Ltd. All rights reserved.
部门归属	[li, x. p.; yan, m.; schaffer, g. b.; qian, m.] univ queensland, sch mech & min engn, arc ctr excellent design light met, ctr adv mat proc & mfg ampam, brisbane, qld 4072, australia. [wang, j. q.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;qian, m (reprint author), univ queensland, sch mech & min engn, arc ctr excellent design light met, ctr adv mat proc & mfg ampam, brisbane, qld 4072, australia.;ma.qian@uq.edu.au
关键词	Glasses Metallic Thermal Stability Phase Transformation Aluminum Nitrogen Alloys
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/60078
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. P. Li,M. Yan,J. Q. Wang,et al. The effect of the gas atmosphere on the response of the Al86Ni6Y4.5Co2La1.5 metallic glass powder to heating[J]. Intermetallics,2012,30:117-121.
APA	X. P. Li,M. Yan,J. Q. Wang,M. Y. Lu,G. B. Schaffer,&M. Qian.(2012).The effect of the gas atmosphere on the response of the Al86Ni6Y4.5Co2La1.5 metallic glass powder to heating.Intermetallics,30,117-121.
MLA	X. P. Li,et al."The effect of the gas atmosphere on the response of the Al86Ni6Y4.5Co2La1.5 metallic glass powder to heating".Intermetallics 30(2012):117-121.