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손인진,김학신 ( I . J . Shon,H . S . Kim ) 한국열처리공학회 1995 熱處理工學會誌 Vol.8 No.2
The effects of heating rate on the combustion temperature, the ignition temperature, the microstrurcture and the shape memory ability of products formed by combustion were investigated. The ignition temperature decreased with increasing heating rate. Combustion temperature and ΔT(difference temperature between the ignition temperature and the combustion temperature) increased with increasing heating rate. The grain size of the product increased with increasing heating rate. Combustion synthesis did not completely occur below the heating rate of 10℃/min. NiTi intermetallic compound was completely formed at the heating rate of 600℃/min and the product by combustion method had a good shape memory effect.
가압통전 활성연소에 의한 치밀한 NiSi2 와 NiSi2-20vol.%Nb 복합재료 제조
김환철(H . C . Kim),손인진(I . J . Shon),박충도(C . D . Park) 한국열처리공학회 2001 熱處理工學會誌 Vol.14 No.1
N/A A method to simultaneously synthesize and consolidate the silicide NiSi₂and the composite NiSi₂-20vo1.%Nb from powders of Ni, Si, and Nb was investigated. Combustion synthesis was carried out under the combined effect of an electric field and mechanical pressure. The final density of the products increased nearly linearly with the applied pressure. Highly dense NiSi₂and NiSi₂20vol.%Nb with relative densities of up to 97% were produced under the simultaneous application of a 60㎫ pressure and a 3000A current on the reactant powders. The respective Vickers microhardness values for these materials were 6.0 and 5.8 ㎬. From indentation crack measurements, the fracture toughness values for NiSi₂and NiSi₂20vol.%Nb were calculated to be 3.3 and 4.7㎫·m^½, respectively.