工艺参数对热等静压法制备多孔NiTi记忆合金孔隙特性的影响
Effect of Parameters on Pore Characteristics of Porous NiTi Shape Memory Alloys Fabricated by Hot Isostatic Pressing
摘 要
采用不封装的热等静压法来制备多孔NiTi形状记忆合金,着重研究了不同工艺参数对孔隙特性的影响规律.结果表明:采用烧结时间3 h制备出的多孔NiTi记忆合金能得到令人满意的孔隙特征,分别采用100 MPa和400 MPa的冷压压力能够制备出两种完全不同孔状结构的多孔NiTi记忆合金,一种是均匀分布的结构,另外一种则是层状结构(多孔层-致密层-多孔层);而且,随着热压压力的增加,孔隙特征参数减小.
孔隙特性
热等静压
porous NiTi shape memory alloy
pore characteristic
HIP
Abstract
Porous NiTi shape memory alloys (SMAs) had been fabricated by capsule-free hot isostatic pressing (CF-HIP).The effect of processing parameters on pore characteristics was investigated emphatically.It is found that porous NiTi SMAs with satisfied pore characteristics should be fabricated by sintering for 3 h.Porous NiTi SMAs with two different pore structures are fabricated by adopting 100 MPa and 400 MPa cold pressures,respectively.One is the structure with homogeneous pore distribution.Another is the sandwich structure along the radial direction (porous layer-dense layer-porous layer).Pore characteristic parameters decrease with increasing hot pressure.
中图分类号 TG113
所属栏目
基金项目 中国博士后科学基金资助项目(20060390199)
收稿日期 2007/4/24
修改稿日期 2007/7/16
网络出版日期
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备注袁斌(1977-),男,江西泰和人,讲师,博士.
引用该论文: YUAN Bin,LIANG Jin-xia,LI Xing,ZENG Mei-qin,GAO Yan. Effect of Parameters on Pore Characteristics of Porous NiTi Shape Memory Alloys Fabricated by Hot Isostatic Pressing[J]. Materials for mechancial engineering, 2008, 32(3): 8～12
袁斌,梁锦霞,李星,曾美琴,高岩. 工艺参数对热等静压法制备多孔NiTi记忆合金孔隙特性的影响[J]. 机械工程材料, 2008, 32(3): 8～12
被引情况:
【1】袁斌,赖铭,梁锦霞,曾美琴,高岩, "烧结时间对多孔NiTi形状记忆合金时效时马氏体相变的影响",机械工程材料 35, 6-10(2011)
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参考文献
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【3】Li B Y,Rong L J,Li Y Y,et al.An investigation of the syn-thesis of Ti-50At.Pct Ni alloys through combustion synthesis and conventional powder sintering[J].Metallurgical & Materials Transactions A,2000,31(7):1867-1871.
【4】Li B Y,Rong L J,Li Y Y.Porous NiTi alloy prepared from elemental powder sintering[J].Jouranl of Materials Research,1998,13(10):2847-2851.
【5】Lagoudas D C,Vandygriff E L.Processing and characterization of NiTi porous SMA by elevated pressure sintering[J].Journal of Intelligent Material Systems and Structures,2002,13(12):837-850.
【6】Chu C L,Chung C Y,Lin P H,et al.Fabrication of porous NiTi shape memory alloy for hard tissue implants by combustion synthesis[J].Materials Science & Engineering A,2004,366(1):114-119.
【7】Yuan B,Chung C Y,Zhu M.Microstructure and martensitic transformation behavior of porous NiTi shape memory alloy prepared by hot isostatic pressing processing[J].Materials Science & Engineering A,2004,382(1/2):181-187.
【8】Li B Y,Rong L J,Li Y Y,et al.Synthesis of porous Ni-Ti shape-memory alloys by self-propagating high-temperature synthesis:Reaction mechanism and anisotropy in pore structure[J].Acta Materials,2000,48(15):3895-3904.
【9】Li B Y,Rong L J,Li Y Y.The influence of addition of TiH2 in elemental powder sintering porous Ni-Ti alloys[J].Materials Science & Engineering A,2000,281(1/2):169-175.
【10】Heckel R W.An analysis of powder compaction phenomena[J].Transaction of The Metallurgical Society of AIME,1961,221:1001-1008.
【11】果世驹.粉末冶金原理[M].北京:冶金工业出版社,1998:4-5.
【12】Kaysser W A,Petzow G.Proceedings Sintering Theory and Practice Conference[M].London:The Metals Society London UK,1984:101.
【13】Solomon A A,Hsu F.Proceedings Sintering and Related Phenomena[M].New York:Plenum Press,1980:485.
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