鉻鈦合金(Cr-Ti alloys)由於會形成Laves相之TiCr_2金屬間化合物,因此具有高熔點、抗腐蝕性與良好的高溫強度,是一種高溫結構材料,適合應用在航太零件上。此外,鉻鈦合金靶材透過濺鍍等方法製備的薄膜,具有高硬度、抗氧化性佳與高耐磨性,可應用在刀具或模具的保護層上,以延長刀具與模具的使用壽命。另一方面,真空熱壓燒結是一種結合燒結與加壓成形的複合式粉末冶金技術,在熱壓過程中,透過石墨模具直接將壓力傳遞至粉末,同時進行材料的壓製與燒結,此方法有助於在較低的燒結溫度下,形成較緻密的材料。本研究以20MPa之壓力,同時運用不同熱壓燒結溫度(1250、1300、1350及1390℃)對Cr_(50)Ti_(50)合金進行真空熱壓燒結,並對製備出的鉻鈦合金進行一連串的分析討論。其結果顯示,鉻鈦合金在20MPa及熱壓時間1小時下的最佳熱壓溫度為1250℃,此時,該合金之相對密度為95.67%及電導率為1.35×10^4S.cm^(-1)。
This study focused on determining the effect of Vacuum Hot-Press Sintering Process temperature on the microstructure and material characteristic of Cr_(50)Ti_(50) alloys. We conducted numerous manufacturing Cr_(50)Ti_(50) experiments under a series of different hot-press sintering temperature from 1,250 to 1,390℃ (1,250, 1,300, 1,350 and 1,390℃, respectively). We observed the microstructures and determined the mechanical and electric characteristics of these manufactured Cr_(50)Ti_(50) alloys. Our experimental results showed that the optimal manufacturing parameters were 1,250℃ at 20 MPa for 1 h of hot-press sintering. The optimally manufactured alloys had a relative density reaching 95.67% and an electrical conductivity 1.35×10^4S‧cm^(-1).