MECHANICAL ALLOYING OF THE NI-AL(M) (M TI, FE) SYSTEM

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	MECHANICAL ALLOYING OF THE NI-AL(M) (M TI, FE) SYSTEM
	Z. G. Liu; J. T. Guo; Z. Q. Hu
	1995
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	192 页码:577-582
摘要	The mechanical alloying of intermetallic compounds has attracted much attention in recent years. The formation of NiAl with B2 structure by mechanical alloying of Ni and Al powder mixture has been found to be an explosive exothermic reaction. In this paper, Ti and Fe elements were substituted for Al and their effects on the mechanical alloying process and the final products of the Ni-Al(M) (M = Ti, Fe) system were studied in detail by in situ thermal analysis, X-ray diffraction and scanning electron microscopy. The results showed that the addition of as much as 15 at.% Ti or 5 at.% Fe for Al prolonged the milling time prior to the explosive reaction, which indicated the abrupt formation of beta phase NiAl(Ti) or NiAl(Fe). The addition of 20 at.% Ti eliminated the abrupt explosive formation of beta phase NiAl(Ti) completely. The addition of 25 at.% Ti induced an NiAlTi amorphous-like phase. The prolongation of the milling time prior to the explosive reaction might be attributed to the addition of Ti or Fe preventing the formation of a fine homogeneous layered structure of Ni, Al and Ti or Fe, thus enhancing the energy threshold for the formation of the beta NiAl(M) (M = Ti,Fe) compound. With an increase in Ti content the degree of ordering of the beta phase NiAl(Ti) compounds decreased, whereas the crystal lattices expanded and the particle size increased. The particle size of the amorphous-like phase was much larger than that of the explosive-formed beta phase NiAl(Ti) compounds.
部门归属	acad sinica, inst met res, state key lab rsa, shenyang 110015, peoples r china.;liu, zg (reprint author), acad sinica, inst met res, dept superalloy & special casting, shenyang 110015, peoples r china
关键词	Alloys Nickel Aluminum Titanium Iron Phases Zn Cr Ni Cu
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38621
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. G. Liu,J. T. Guo,Z. Q. Hu. MECHANICAL ALLOYING OF THE NI-AL(M) (M TI, FE) SYSTEM[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,1995,192:577-582.
APA	Z. G. Liu,J. T. Guo,&Z. Q. Hu.(1995).MECHANICAL ALLOYING OF THE NI-AL(M) (M TI, FE) SYSTEM.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,192,577-582.
MLA	Z. G. Liu,et al."MECHANICAL ALLOYING OF THE NI-AL(M) (M TI, FE) SYSTEM".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 192(1995):577-582.