THERMAL-STABILITY AND GRAIN-GROWTH OF A MELT-SPUN HFNI5 NANOPHASE ALLOY

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	THERMAL-STABILITY AND GRAIN-GROWTH OF A MELT-SPUN HFNI5 NANOPHASE ALLOY
	K. Lu; Z. F. Dong; I. Bakonyi; A. Cziraki
	1995
发表期刊	Acta Metallurgica Et Materialia
ISSN	0956-7151
卷号	43 期号:7 页码:2641-2647
摘要	A single phase HfNi5 nanocrystalline (NC) sample was prepared by quenching a Hf11Ni89 alloy with the melt-spinning technique. A randomly oriented HfNi5 nanophase material with an average grain size of about 10 nm was formed in the as-quenched state. Differential scanning calorimetry (DSC), transmission electron microscopy (TEM), and X-ray diffraction (XRD) analysis were used for the investigation of the thermal stability and grain growth of the NC HfNi5 sample. On heating the NC sample at a constant heating rate, two exothermal peaks appear in the DSC curve, corresponding to a grain-growth process of the HfNi5 nanophase prior to a precipitation process of Ni solid solution. It was found the grain-growth temperature of the NC HfNi5 phase is approximately equal to the crystallization temperature of the same compositional amorphous alloy. The average grain boundary energy in the NC sample calculated by means of the calorimetric results, is about 0.36J/m(2). Activation energies for the grain growth and Ni precipitation are calculated by using the Kissinger equation. It was obtained that the value of the activation energy for the HfNi5 nanophase grain growth is close to that for the volume self-diffusion in Hf. The grain growth mechanism and the thermal stability of the NC material are also discussed.
部门归属	acad sinica, inst met res, int ctr mat phys, shenyang 110015, peoples r china. hungarian acad sci, solid state phys res inst, h-1525 budapest, hungary. eotvos lorand univ, inst solid state phys, h-1088 budapest, hungary.;lu, k (reprint author), acad sinica, inst met res, natl lab rsa, shenyang 110015, peoples r china
关键词	Ni-p Alloys Nanocrystalline
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38626
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	K. Lu,Z. F. Dong,I. Bakonyi,et al. THERMAL-STABILITY AND GRAIN-GROWTH OF A MELT-SPUN HFNI5 NANOPHASE ALLOY[J]. Acta Metallurgica Et Materialia,1995,43(7):2641-2647.
APA	K. Lu,Z. F. Dong,I. Bakonyi,&A. Cziraki.(1995).THERMAL-STABILITY AND GRAIN-GROWTH OF A MELT-SPUN HFNI5 NANOPHASE ALLOY.Acta Metallurgica Et Materialia,43(7),2641-2647.
MLA	K. Lu,et al."THERMAL-STABILITY AND GRAIN-GROWTH OF A MELT-SPUN HFNI5 NANOPHASE ALLOY".Acta Metallurgica Et Materialia 43.7(1995):2641-2647.