立方氮化硼用量及粒度對其同鈦鋁碳結(jié)合劑的反應程度的影響
發(fā)布時間:2018-08-22 11:23
【摘要】:為研究CBN用量對Ti_3AlC_2結(jié)合劑CBN復合材料的影響,使用不同質(zhì)量配比的Ti3AlC2粉體和CBN粉體通過放電等離子體燒結(jié)的方式制備試樣,并對比其物相組成和顯微形貌。結(jié)果表明:當CBN質(zhì)量分數(shù)為10%時,試樣的主相為Ti_3AlC_2、CBN和TiC;當CBN質(zhì)量分數(shù)為20%~40%時,生成了TiC、TiN、AlN、TiB_2等物相。另一方面,當CBN質(zhì)量分數(shù)為10%和20%時,CBN表面會形成厚約10μm的過渡層;當CBN質(zhì)量分數(shù)為30%和40%時,CBN與基體間沒有過渡層。若選用粒度尺寸為10μm的CBN(質(zhì)量分數(shù)為10%)進行燒結(jié),則復合材料中出現(xiàn)許多氣孔,基體主相為TiC等軸晶粒且在CBN表面形成厚度1~2μm的過渡層。CBN質(zhì)量分數(shù)越大或粒度尺寸越小,其同Ti_3AlC_2的反應越充分、過渡層越薄。
[Abstract]:In order to study the effect of CBN content on Ti_3AlC_2 binder CBN composites, the samples were prepared by spark plasma sintering with different mass ratios of Ti3AlC2 powder and CBN powder, and their phase composition and microstructure were compared. The results show that when the mass fraction of CBN is 10, the main phases of the sample are TiTi3AlC2C2CBN and tic, and when the mass fraction of CBN is 20-400.When the mass fraction of CBN is 20 ~ 40wt%, the TiCn-TiN- TiB-2 and other phases are formed. On the other hand, when the mass fraction of CBN is 10% and 20%, there will be a transition layer about 10 渭 m thick on the surface, and there is no transition layer between CBN and substrate when the mass fraction of CBN is 30% and 40%. If 10 渭 m CBN (mass fraction is 10%) is selected for sintering, there will be many pores in the composites. The larger the mass fraction or the smaller the particle size is, the larger the mass fraction of the transition layer is or the smaller the particle size is. The main phase of the matrix is TiC equiaxed grain and the transition layer with thickness of 1 渭 m is formed on the surface of CBN. The more fully it reacts with Ti_3AlC_2, the thinner the transition layer is.
【作者單位】: 中原工學院材料與化工學院;金剛石技術(shù)國家地方聯(lián)合工程實驗室;
【基金】:河南省高校創(chuàng)新團隊項目(15IRTSTHN004) 河南省省院科技合作項目(142106000193) 河南省教育廳自然科學研究計劃項目資助(14A430007) 河南省科技開放合作項目(142106000051) 鄭州市人才引育項目(141PRCYY514) 鄭州市國際科技合作與交流項目(153PGJHZ209)
【分類號】:TB33
本文編號:2196954
[Abstract]:In order to study the effect of CBN content on Ti_3AlC_2 binder CBN composites, the samples were prepared by spark plasma sintering with different mass ratios of Ti3AlC2 powder and CBN powder, and their phase composition and microstructure were compared. The results show that when the mass fraction of CBN is 10, the main phases of the sample are TiTi3AlC2C2CBN and tic, and when the mass fraction of CBN is 20-400.When the mass fraction of CBN is 20 ~ 40wt%, the TiCn-TiN- TiB-2 and other phases are formed. On the other hand, when the mass fraction of CBN is 10% and 20%, there will be a transition layer about 10 渭 m thick on the surface, and there is no transition layer between CBN and substrate when the mass fraction of CBN is 30% and 40%. If 10 渭 m CBN (mass fraction is 10%) is selected for sintering, there will be many pores in the composites. The larger the mass fraction or the smaller the particle size is, the larger the mass fraction of the transition layer is or the smaller the particle size is. The main phase of the matrix is TiC equiaxed grain and the transition layer with thickness of 1 渭 m is formed on the surface of CBN. The more fully it reacts with Ti_3AlC_2, the thinner the transition layer is.
【作者單位】: 中原工學院材料與化工學院;金剛石技術(shù)國家地方聯(lián)合工程實驗室;
【基金】:河南省高校創(chuàng)新團隊項目(15IRTSTHN004) 河南省省院科技合作項目(142106000193) 河南省教育廳自然科學研究計劃項目資助(14A430007) 河南省科技開放合作項目(142106000051) 鄭州市人才引育項目(141PRCYY514) 鄭州市國際科技合作與交流項目(153PGJHZ209)
【分類號】:TB33
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