CN102060535B - Method for preparing high-purity Ti3AlC2 ceramics - Google Patents

Method for preparing high-purity Ti3AlC2 ceramics Download PDF

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CN102060535B
CN102060535B CN 201010138411 CN201010138411A CN102060535B CN 102060535 B CN102060535 B CN 102060535B CN 201010138411 CN201010138411 CN 201010138411 CN 201010138411 A CN201010138411 A CN 201010138411A CN 102060535 B CN102060535 B CN 102060535B
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powder
ti3alc2
tic
ti
temperature
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CN102060535A (en
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艾桃桃
冯小明
赵卓玲
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陕西理工学院
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一种高纯Ti3AlC2陶瓷的制备方法,以TiC粉、Ti粉和Al粉为原料,以硬脂酸钠为分散剂、乙醇为球磨助剂进行湿磨,室温干燥,过筛后预压成饼状,放入石墨模具中以5℃/min-20℃/min的升温速率升至1300℃-1500℃,保温0.5-3.0小时,热压压力为10-25MPa,随炉冷却至室温即可。 A process for producing high purity Ti3AlC2 ceramic powder of TiC, Ti and Al powder as raw material powder, sodium stearate as a dispersing agent, ethanol as milling aids wet grinding, drying at room temperature after sieving into cakes preloading shape, placed in a graphite mold at a heating rate of 5 ℃ / min-20 ℃ / min was raised to 1300 ℃ -1500 ℃, 0.5 to 3.0 hours incubation, pressing pressure of 10-25MPa, furnace cooling to room temperature. 本发明由于工艺简单,通过加入球磨助剂和分散剂能显著提高球磨混合效率,增加反应活性,制备的产物晶粒尺寸均匀;用TiC替代单质Ti粉和C粉,不仅成本降低,而且产物纯度较高,主晶相主要为Ti3AlC2。 The present invention is due to the simple process by the addition of milling aids and dispersants can significantly improve the ball mill mixing efficiency, increase the reactivity, homogeneous product grain size prepared; with TiC Alternatively elemental Ti powder and C powder, not only reduce the cost, and purity of the product high, main phase mainly Ti3AlC2.

Description

—种高纯Ti3AIC2陶瓷的制备方法技术领域[0001] 本发明属于材料科学领域,具体涉及一种高纯Ti3AlC2陶瓷的制备方法。 - Species TECHNICAL FIELD high purity ceramic Ti3AIC2 [0001] The present invention belongs to the field of material science, particularly relates to a method for preparing high-purity ceramic Ti3AlC2. 背景技术[0002] 航空航天、能源动力、机械及军工等高技术行业要求关键性结构件既具有高比强度和比刚度、高硬度、高韧性、耐磨,同时又要耐腐蚀、耐高温等。 [0002] aerospace, energy and power, machinery and other high-tech military industry requires critical structural parts with both high specific strength and specific stiffness, high hardness, high toughness, wear resistance, while also corrosion-resistant, high temperature, etc. . 因此,大多数金属件已难以满足实际应用。 Therefore, most of the metal has been difficult to meet the actual application. 碳化物、硼化物、氮化物等陶瓷具有高强度、高模量和高硬度,且较金属耐磨、耐高温和抗氧化,加之低的密度和热膨胀系数,可替代金属件用于关键性结构件。 Carbides, borides, nitrides and other ceramic has a high strength, high modulus and high hardness, and more wear-resistant metal, and high temperature oxidation resistance, combined with low density and thermal expansion coefficient, an alternative metal for critical structures pieces. 但是, 陶瓷多由离子键或共价键构成,性脆、难以加工、导电和导热性差,其应用亦受到了限制。 However, ceramic is composed of multiple ionic or covalent bonds, brittle, difficult to process, poor electrical and thermal conductivity, its application is also limited. [0003] Ti3AlC2具有层状六方结构,它们的原子结合方式既有共价键、离子键,又有金属键,因而兼具金属和陶瓷的性质。 [0003] Ti3AlC2 a hexagonal layered structure, bonding of their atoms manner both covalent bonds, ionic bonds, metallic bonds have therefore both ceramic and metallic properties. 如,类似金属的导热、导电、抗热震和可加工性,类似陶瓷的抗氧化、耐腐蚀和耐高温;特别是具有非同寻常的耐磨性和自润滑性。 For example, the thermally conductive metal like conductivity, workability, and thermal shock, ceramic-like oxidation, corrosion and heat; in particular, has an extraordinary wear resistance and self-lubricating. 因此,在许多领域具有重要的应用价值。 Therefore, it has important applications in many fields. 目前,国内外在Ti3AlC2的制备研究方面面临的主要困难是如何制备高含量的Ti3AlC2,即如何避免TiC等杂质相的生成问题。 Currently, the main difficulties faced by domestic and foreign research in preparation Ti3AlC2 is how to prepare Ti3AlC2 high levels, namely, how to avoid generating problems such as TiC impurity phase. [0004] 恰当的Ti、Al、C元素比和反应温度是制备高纯Ti3AlC2的必要条件。 [0004] The appropriate Ti, Al, C element ratio and the reaction temperature is a necessary condition for the preparation of high purity Ti3AlC2. Ti : Al : C 的理论摩尔比应该为3 : I : 2,事实上严格按照该比例配制时,往往难以获得高11#1(:2含量的反应产物。高温Al的挥发被认为是造成TiC杂质相生成的重要原因。另外,Ti3AlC2 制备温度较高(大于1350°C ),体系反应温度区间窄,亦是影响其纯度的一个重要原因。发明内容[0005] 本发明的目的在于克服上述现有技术的缺点,提供了一种不仅降低了成本,而且产物纯度较高,主晶相主要为Ti3AlC2的高纯Ti3AlC2陶瓷的制备方法。[0006] 为达到上述目的,本发明采用的技术方案是:[0007] I)首先,取TiC粉、Ti粉和Al 粉按TiC粉:Ti 粉:Al粉=2. O : I. O : (1.0-1.5) 的原子配比混合;[0008] 2)其次,将混合后的粉体置入不锈钢球磨罐内,加入混合粉体质量O. 3-2. O %的硬脂酸钠作为分散剂、30-80%的乙醇作为球磨助剂制成混合料进行球磨,研磨介质为钢球,磨机转速为800-1200转/ Ti: Al: Theory C molar ratio should be 3: I: 2, in fact formulated strictly in accordance with the ratio is often difficult to obtain high 11 # 1 (: 2 reaction product of a high temperature volatile content of Al is considered to be caused by TiC important reasons impurity phase generation. Further, the preparation of high Ti3AlC2 temperatures (greater than 1350 ° C), the temperature of the reaction system, narrow range is also an important factor affecting a purity SUMMARY oF tHE iNVENTION [0005] the object of the present invention to overcome the above-described current art disadvantages, there is provided a not only reduces costs, and higher purity, as main crystalline phase mainly the preparation of high-purity ceramic Ti3AlC2 of Ti3AlC2. [0006] to achieve the above object, the technical solution of the present invention uses a : [0007] I) first, to take TiC powder, Ti powder and Al powder by TiC powder: Ti powder: Al powder = 2 O: I. O: (1.0-1.5) atomic ratio of mixing; [0008] 2. ) Next, the mixed powder into a stainless steel ball mill pot, the mixed powder was added mass O. 3-2. O% sodium stearate as a dispersing agent, 30-80% of ethanol as milling aids made ball milling the mixture, the grinding media is steel balls, the mill speed of 800-1200 revolutions / 分钟,磨球与混合料的质量比为3 : 1-20 : 1,球磨2_8小时获得细化粉体并将其干燥;[0009] 3)然后,将干燥后的混合料预压成饼状,置入石墨模具内,在真空条件下自室温以50C /min-20°C /min的升温速率升温至1300°C _1500°C,当温度达到700°C时开始加压使压力达到10-25MPa,保温保压O. 5-3. O小时;[0010] 4)最后,保温保压结束后,随炉自然冷却到室温即得到Ti3AlC2陶瓷。 Mass ratio minutes, the balls and the mixture is 3: 1 to 20: 1, 2_8 hours milling the powder to obtain refined and dried; [0009] 3) Then, after drying the mixture into a pie preloading , placed in a graphite mold, heated from room temperature at a heating rate of 50C / min-20 ° C / min to 1300 ° C _1500 ° C under vacuum conditions, when the temperature reaches 700 ° C starting pressurization to a pressure of 10- 25MPa, pressure and temperature O. 5-3 O h;. [0010] 4) Finally, the pressure and temperature for the end, with the furnace cooled to room temperature to obtain a ceramic Ti3AlC2. [0011] 为了避免其它一些杂质相的生成,本发明用TiC替代单质Ti粉、C粉,以TiC、Ti、 Al为原料,且在机械球磨时加入了球磨助剂和分散剂,提高了研磨效率,增加了体系的反应活性;采用TiC替代Ti粉和C粉,成本降低,TiC亦是形成Ti3AlC2的重要组分,整个工艺简单,操作方便,而且按照本发明的工艺方法制得的Ti3AlC2陶瓷具有纯度高、组织分布理想等特点。 [0011] In order to avoid some other generated impurity phase, the present invention is replaced by TiC elemental Ti powder, C powder to TiC, Ti, of Al as a raw material, and added to the milling aids and dispersants during mechanical milling, improved grinding efficiency, increasing the reaction activity of the system; the use of TiC powder and C powder Ti alternative, lower cost, is also an important component of TiC Ti3AlC2 formed, the overall process is simple, easy to operate, and the method of Ti3AlC2 ceramics obtained according to the present invention having a high purity, over the tissue distribution characteristics. 附图说明[0012] 下面结合附图和实施例对本发明进一步说明。 BRIEF DESCRIPTION [0012] The present invention is further described below in conjunction with the accompanying drawings and embodiments. [0013] 图I、图2是本发明制备的Ti3AlC2陶瓷的X射线衍射图谱。 [0013] FIG. I, Fig. 2 is an X-ray diffraction pattern of the produced ceramic Ti3AlC2 the present invention. [0014] 图3、图4是本发明制备的Ti3AlC2陶瓷的扫描照片。 [0014] FIG. 3, FIG. 4 is a scanned picture Ti3AlC2 ceramic prepared according to the invention. 具体实施方式[0015] 实施例I :[0016] I)首先,取TiC 粉、Ti 粉和Al 粉按TiC 粉:Ti 粉:Al 粉=2. O : 1.0 : I. O 的原子配比混合;[0017] 2)其次,将混合后的粉体置入不锈钢球磨罐内,加入混合粉体质量O. 5%的硬脂酸钠作为分散剂、50%的乙醇作为球磨助剂制成混合料进行球磨,研磨介质为钢球,磨机转速为800转/分钟,磨球与混合料的质量比为8 : 1,球磨4小时获得细化粉体并将其干燥;[0018] 3)然后,将干燥后的混合料预压成饼状,置入石墨模具内,在真空条件下自室温以5°C /min的升温速率升温至300°C,然后再以10°C /min的升温速率升温至1500°C,当温度达到700°C时开始加压使压力达到20MPa,保温保压2小时;[0019] 4)最后,保温保压结束后,随炉自然冷却到室温即得到Ti3AlC2陶瓷。 DETAILED DESCRIPTION [0015] Example I: [0016] I) First, to take TiC powder, Ti powder and Al powder by TiC powder: Ti powder: Al powder = 2 O:. 1.0: I. O atomic ratio of mixing ; [0017] 2) Next, the mixed powder into a stainless steel ball mill pot, the mixed powder was added O. 5% by mass of sodium stearate as a dispersant, 50% ethanol as a ball mill to prepare a mixed aid ball milling the material, steel balls as grinding media, mill speed of 800 revolutions / minute, and the mass ratio of balls to mix 8: 1, 4 hours milling a powder and dried to obtain refined; [0018] 3) then, after drying the mixture into a pie preloading, placed in a graphite mold, heated from room temperature at a heating rate of 5 ° C / min to 300 ° C under vacuum, then at 10 ° C / min to heating rate was raised to 1500 ° C, when the temperature reaches 700 ° C to a pressure of 20 MPa or starting pressurization, pressure and temperature for 2 hours; [0019] 4) Finally, after the end of the pressure and temperature, with the furnace cooled to room temperature to obtain Ti3AlC2 ceramics. [0020] 测试照片见图I和图3。 [0020] Test I and Figure 3 photographs. [0021] 图I为TiC-Ti-Al体系于1500°C、保温2h后制备的样品的X射线衍射图(XRD)。 [0021] Figure I is a TiC-Ti-Al system at 1500 ° C, X-ray diffraction pattern of a sample prepared after incubation for 2h (XRD). XRD分析结果表明,主晶相主要为Ti3AlC2,检测不到TiC相的存在。 XRD analysis showed that the main phase mainly of Ti3AlC2, TiC phase could not be detected. [0022] 图3为TiC-Ti-Al体系于1500°C、保温2h后制备的样品的断口扫描照片(SEM)。 [0022] FIG 3 sample was TiC-Ti-Al system at 1500 ° C, 2h After incubation preparation fracture scan photos (SEM). SEM分析表明,形成了Ti3AlC2典型片层组织。 SEM analysis showed the formation of the typical lamellar microstructure Ti3AlC2. [0023] 实施例2 :[0024] I)首先,取TiC 粉、Ti 粉和Al 粉按TiC 粉:Ti 粉:Al 粉=2. O : 1.0 : I. O 的原子配比混合;[0025] 2)其次,将混合后的粉体置入不锈钢球磨罐内,加入混合粉体质量O. 5%的硬脂酸钠作为分散剂、40%的乙醇作为球磨助剂制成混合料进行球磨,研磨介质为钢球,磨机转速为800转/分钟,磨球与混合料的质量比为8 : 1,球磨4小时获得细化粉体并将其干燥;[0026] 3)然后,将干燥后的混合料预压成饼状,置入石墨模具内,在真空条件下自室温以IO0C /min的升温速率升温至300°C,然后再以20°C /min的升温速率升温至1450°C,当温度达到700°C时开始加压使压力达到20MPa,保温保压2小时;[0027] 4)最后,保温保压结束后,随炉自然冷却到室温即得到Ti3AlC2陶瓷。 [0023] Example 2: [0024] I) First, to take TiC powder, Ti powder and Al powder by TiC powder: Ti powder: Al powder = 2 O: 1.0: I. O atomic ratio of mixing; [0025. ] 2) Next, the mixed powder into a stainless steel ball mill pot, the mixed powder was added O. 5% by mass of sodium stearate as a dispersant, 40% ethanol as milling aids made of ball-milled mixture , the grinding media is steel balls, the mill speed of 800 revolutions / minute, and the mass ratio of balls to mix 8: 1, 4 hours to obtain refined powder milling and drying; [0026] 3) then, after drying the pre-mix is ​​pressed into a cake, placed in a graphite mold, heated from room temperature at a heating rate of IO0C / min to 300 ° C under vacuum, then heated to 1450 at a heating rate of 20 ° C / min to ° C, when the temperature reaches 700 ° C to a pressure of 20 MPa or starting pressurization, pressure and temperature for 2 hours; [0027] 4) Finally, the pressure and temperature for the end, with the furnace cooled to room temperature to obtain a ceramic Ti3AlC2. [0028] 测试照片见图2和图4。 [0028] Figures 2 and Test 4 photos. [0029] 图2为TiC-Ti-Al体系于1450°C、保温2h后制备的样品的X射线衍射图(XRD)。 [0029] FIG. 2 is a X-ray diffraction pattern of a sample TiC-Ti-Al system at 1450 ° C, 2h incubation after preparation (XRD). XRD分析结果表明,主晶相为Ti3AlC2,有微量TiC相存在。 XRD analysis showed that the main phase of Ti3AlC2, trace TiC phase. [0030] 图4为TiC-Ti-Al体系于1450°C、保温2h后制备的样品的断口扫描照片(SEM)。 [0030] FIG. 4 is a TiC-Ti-Al system at 1450 ° C, fracture scanned picture sample prepared after incubation for 2h (SEM). SEM分析表明,形成了Ti3AlC2典型片层组织,晶粒较图3减小,主要是由于TiC的钉扎作用抑制了晶粒的生长。 SEM analysis showed the formation of the typical lamellar Ti3AlC2, FIG. 3 is reduced compared to grain, mainly due to the pinning effect of suppressing TiC grain growth. [0031] 实施例3:[0032] I)首先,取TiC 粉、Ti 粉和Al 粉按TiC 粉:Ti 粉:Al 粉=2. O : 1.0 : I. 2 的原子配比混合;[0033] 2)其次,将混合后的粉体置入不锈钢球磨罐内,加入混合粉体质量I. 2%的硬脂酸钠作为分散剂、60%的乙醇作为球磨助剂制成混合料进行球磨,研磨介质为钢球,磨机转速为1000转/分钟,磨球与混合料的质量比为12 : 1,球磨2小时获得细化粉体并将其干燥;[0034] 3)然后,将干燥后的混合料预压成饼状,置入石墨模具内,在真空条件下自室温以200C /min的升温速率升温至1300°C,当温度达到700°C时开始加压使压力达到lOMPa,保温保压O. 5小时;[0035] 4)最后,保温保压结束后,随炉自然冷却到室温即得到Ti3AlC2陶瓷。 [0031] Example 3: [0032] I) First, to take TiC powder, Ti powder and Al powder by TiC powder: Ti powder: Al powder = 2 O: 1.0: I. 2 atomic ratio of mixing; [0033 ] 2) Next, the mixed powder into a stainless steel ball mill pot, the mixed powder was added I. 2% by mass of sodium stearate as a dispersant, 60% ethanol as milling aids made of ball-milled mixture , the grinding media is steel balls, the mill speed was 1000 rev / min, and the mass ratio of balls to mix 12: 1, milling 2 hours to obtain refined powder and dried; [0034] 3) then, after drying the pre-mix is ​​pressed into a cake, placed in a graphite mold, heated from room temperature at a heating rate of 200C / min to 1300 ° C under vacuum conditions, when the temperature reaches 700 ° C begins to pressurize until the pressure became lOMPa , pressure and temperature O. 5 hours; [0035] 4) Finally, after the end of the pressure and temperature, with the furnace cooled to room temperature to obtain a ceramic Ti3AlC2. [0036] 实施例4 :[0037] I)首先,取TiC 粉、Ti 粉和Al 粉按TiC 粉:Ti 粉:Al 粉=2. O : 1.0 : I. 5 的原子配比混合;[0038] 2)其次,将混合后的粉体置入不锈钢球磨罐内,加入混合粉体质量I. 5%的硬脂酸钠作为分散剂、30%的乙醇作为球磨助剂制成混合料进行球磨,研磨介质为钢球,磨机转速为1200转/分钟,磨球与混合料的质量比为15 : 1,球磨5小时获得细化粉体并将其干燥;[0039] 3)然后,将干燥后的混合料预压成饼状,置入石墨模具内,在真空条件下自室温以15°C /min的升温速率升温至1350°C,当温度达到700°C时开始加压使压力达到25MPa,保温保压3小时;[0040] 4)最后,保温保压结束后,随炉自然冷却到室温即得到Ti3AlC2陶瓷。 [0036] Example 4: [0037] I) First, to take TiC powder, Ti powder and Al powder by TiC powder: Ti powder: Al powder = 2 O: 1.0: I. mixing ratio of 5 atoms; [0038. ] 2) Next, the mixed powder into a stainless steel ball mill pot, the mixed powder was added I. 5% by mass of sodium stearate as a dispersant, 30% ethanol as milling aids made ball-milled mixture , the grinding media is steel balls, the mill speed was 1200 rev / min, and the mass ratio of balls to mix 15: 1, 5 hours to obtain refined powder milling and drying; [0039] 3) then, after drying the pre-mix is ​​pressed into a cake, placed in a graphite mold, heated from room temperature at a heating rate of 15 ° C / min to 1350 ° C under vacuum conditions, when the temperature reaches 700 ° C and the pressure begins to pressurize reaches 25MPa, pressure and temperature for 3 hours; [0040] 4) Finally, the pressure and temperature for the end, with the furnace cooled to room temperature to obtain a ceramic Ti3AlC2. [0041] 实施例5:[0042] I)首先,取TiC 粉、Ti 粉和Al 粉按TiC 粉:Ti 粉:Al 粉=2. O : 1.0 : I. 3 的原子配比混合;[0043] 2)其次,将混合后的粉体置入不锈钢球磨罐内,加入混合粉体质量O. 3%的硬脂酸钠作为分散剂、80%的乙醇作为球磨助剂制成混合料进行球磨,研磨介质为钢球,磨机转速为1100转/分钟,磨球与混合料的质量比为20 : 1,球磨8小时获得细化粉体并将其干燥;[0044] 3)然后,将干燥后的混合料预压成饼状,置入石墨模具内,在真空条件下自室温以80C /min的升温速率升温至1400°C,当温度达到700°C时开始加压使压力达到15MPa,保温保压I小时;[0045] 4)最后,保温保压结束后,随炉自然冷却到室温即得到Ti3AlC2陶瓷。 [0041] Example 5: [0042] I) First, to take TiC powder, Ti powder and Al powder by TiC powder: Ti powder: Al powder = 2 O: 1.0:. I. mixing ratio of 3 atoms; [0043 ] 2) Next, the mixed powder into a stainless steel ball mill pot, the mixed powder was added O. 3% by mass of sodium stearate as a dispersant, 80% ethanol as milling aids made of ball-milled mixture , the grinding media is steel balls, the mill speed was 1100 rev / min, and the mass ratio of balls to mix 20: 1, 8 hours to give a ball mill and dried refined powder; [0044] 3) then, after drying the pre-mix is ​​pressed into a cake, placed in a graphite mold, heated from room temperature at a heating rate of 80C / min to 1400 ° C under vacuum conditions, when the temperature reaches 700 ° C starting pressurization to a pressure of 15MPa , pressure and temperature for I hour; [0045] 4) Finally, after the end of the pressure and temperature, with the furnace cooled to room temperature to obtain a ceramic Ti3AlC2. [0046] 实施例6 :[0047] I)首先,取TiC 粉、Ti 粉和Al 粉按TiC 粉:Ti 粉:Al 粉=2. O : 1.0 : I. 4 的原子配比混合;[0048] 2)其次,将混合后的粉体置入不锈钢球磨罐内,加入混合粉体质量2. 0%的硬脂酸钠作为分散剂、70%的乙醇作为球磨助剂制成混合料进行球磨,研磨介质为钢球,磨机转速为900转/分钟,磨球与混合料的质量比为3 : 1,球磨6小时获得细化粉体并将其干燥;[0049] 3)然后,将干燥后的混合料预压成饼状,置入石墨模具内,在真空条件下自室温以13°C /min的升温速率升温至1480°C,当温度达到700°C时开始加压使压力达到20MPa,保温保压2. 5小时;[0050] 4)最后,保温保压结束后,随炉自然冷却到室温即得到Ti3AlC2陶瓷。 [0046] Example 6: [0047] I) First, to take TiC powder, Ti powder and Al powder by TiC powder: Ti powder: Al powder = 2 O: 1.0:. I. mixing ratio of 4 atoms; [0048 ] 2) Next, the mixed powder into a stainless steel ball mill pot, the mixed powder was added 2.0% by mass of sodium stearate as a dispersant, 70% ethanol mixture is made as a ball mill for milling aid , the grinding media is steel balls, the mill speed of 900 rev / min, and the mass ratio of balls to the mixture 3: 1, 6 hours to obtain refined powder milling and drying; [0049] 3) then, after drying the pre-mix is ​​pressed into a cake, placed in a graphite mold, heated from room temperature at a heating rate of 13 ° C / min to 1480 ° C under vacuum conditions, when the temperature reaches 700 ° C and the pressure begins to pressurize reaches 20 MPa or, pressure and temperature for 2.5 hours; [0050] 4) Finally, after the end of the pressure and temperature, with the furnace cooled to room temperature to obtain a ceramic Ti3AlC2.

Claims (1)

1. 一种高纯Ti3Aic2陶瓷的制备方法,其特征在于: 1)首先,取 TiC 粉、Ti 粉和Al 粉按TiC 粉:Ti 粉:Al 粉=2. O : I. O : (1.0-1.5)的原子配比混合; 2)其次,将混合后的粉体置入不锈钢球磨罐内,加入混合粉体质量O. 3-2. O %的硬脂酸钠作为分散剂、30-80%的こ醇作为球磨助剂制成混合料进行球磨,研磨介质为钢球,球磨机转速为800-1200转/分钟,磨球与混合料的质量比为3 : 1-20 : 1,球磨2_8小时获得细化粉体并将其干燥; 3)然后,将干燥后的混合料预压成饼状,置入石墨模具内,在真空条件下自室温以50C /min-20°C /min的升温速率升温至1300°C _1500°C,当温度达到700°C时开始加压使压カ达到10-25MPa,保温保压O. 5-3. O小时; 4)最后,保温保压结束后,随炉自然冷却到室温即得到Ti3AlC2陶瓷。 1. A method for preparing high-purity ceramic Ti3Aic2, characterized in that: 1) First, to take TiC powder, Ti powder and Al powder by TiC powder: powder of Ti: Al powder = 2 O:. I. O: (1.0- 1.5) atomic mixing ratio; 2) Next, the mixed powder into a stainless steel ball mill pot, the mixed powder was added O. 3-2 O% by mass of sodium stearate as a dispersant, 30-80. % of alcohol as a milling aid ko mixture made ball milling, the milling media is steel balls, a ball mill rotating at 800-1200 revolutions / minute, and the mass ratio of balls to mix 3: 1 to 20: 1, milling 2_8 hours and dried to obtain refined powder; 3) then, after drying the mixture into a pie preloading, placed in a graphite mold, under vacuum from room temperature at 50C / min-20 ° C / min to heating rate was raised to 1300 ° C _1500 ° C, when the temperature reaches 700 ° C start pressing the pressing grades reach 10-25MPa, pressure and temperature O. 5-3 O h;. end 4) Finally, after the pressure and temperature , with the furnace cooled to room temperature to obtain a ceramic Ti3AlC2.
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