Mullitization of cyanite at high sintering temperature 高溫?zé)Y(jié)條件下藍晶石的莫來石化
Diffuser disc is produced from aluminum oxide and ceramic bonded together with high sintering temperature 性能特點: 1 .曝氣盤采用氧化鋁磨料和陶瓷結(jié)合劑高溫?zé)Y(jié)而成。
Silicon carbide board : it is combined with high purity silicon carbide and ultra fines . shaped by vibration , maded by high sintering 碳化硅棚板:是以高純碳化硅與超細粉結(jié)合,經(jīng)振動成型,高溫?zé)Y(jié)而成。
The highest sintering temperature was 900 c , and the sintering lasted 70 seconds . the conventional sintered magnets were sintered at 1000 c for 1h 常規(guī)燒結(jié)的溫度為1000 ,燒結(jié)時間為1h ,并分別在800和600各進行1h的回火。
Low heating rate and high sintered pressure were profitably for reducing the rate of pore so as to increase the relative density of sintered body 低的升溫速率和高的燒結(jié)壓力有利于氣孔的排出,降低氣孔率,從而提高燒結(jié)體的致密度。
No remarkable grain growth has been found during the phase transformation annealing . high sintering densities over 83 % of theoretical ones have been obtained for the hot - pressed samples 實驗結(jié)果表明,熱壓試樣都有較高的燒結(jié)密度,致密度均超過83 ,最高達到了99 。
The experimental results show thatthe high sintered density of m2t and fine thermal stability could got with the 5wt % additive of zro2 at 1500c for 2 hours . and the additive of m2t can effectively restrain the decomposition of at and promote the sinter process , which enhanced the density of at and promote the strength 實驗研究表明, m2t在加入5wt的zro _ 2后,能夠在1500保溫2小時燒結(jié)致密,且熱性能穩(wěn)定。 m2t不但可以有效地抑制at的分解,而且能夠有效促進at的燒結(jié),提高at的致密度,進而提高其力學(xué)強度。
The highest sintering temperature got higher and the speed of temperature became faster , with the fining of the powder particle size or the increase of the microwave source ' s power or the decrease of the green compact ' s volume . the sintering time became shorter , with the fining of the powder particle size or the decrease of the microwave source ' s power or the increase of the green compact ' s volume 隨著功率的提高,燒結(jié)的最高溫度上升、燒結(jié)時間延長、升溫速率略有提高;隨著粒徑的減小,燒結(jié)的最高溫度上升、燒結(jié)時間縮短、升溫速率明顯提高;隨著初坯體積增大,則燒結(jié)的最高溫度下降、燒結(jié)時間縮短、升溫速率降低;初坯的密度對燒結(jié)過程影響不大。
Spark plasma sintering ( sps ) is a kind of new sintering technology for materials synthesis and processing , it has such advantages as high sintering speed , low sintering temperature , it also can retain the origin state of the sintered materials , as such make the sintered materials keep the state of un - equilibrium in this paper , sps was conceived of treating iron covered silicon powder to keeping the origin state of the powder 放電等離子燒結(jié)( sparkplasmasintering簡稱sps )是一種材料快速制備新技術(shù),它具有燒結(jié)速度快,燒結(jié)溫度低,使燒結(jié)材料處于遠離平衡狀態(tài),并能保持材料的原有狀態(tài)等重要特點。本文設(shè)想制各出鐵硅包覆粉末,再利用sps進行遠離平衡狀態(tài)的處理,來獲得保持原始粉末自然狀態(tài)的合金塊體。
W - cu composites prepared from the precipitation w - cu powder have higher sintered density , better mechanical and physical property , more homogeneous and finer microstructure than those prepared from w - cu powder by the balling - reduction method . in chapter 5 , a combination of homogeneous precipitation and ball - milling process , namely the mechano - thermochemical process was employed to prepare ultra - fine w - cu powder 其中,球磨w一cu復(fù)合粉( hp一m )壓坯在1150下燒結(jié)30min后,可獲得相對密度大于99 %的幾乎全致密的超細晶粒w一cu復(fù)合材料, w的顆粒度小于0 . 5林m 。