CN102658368A - Method for connecting carbon fiber reinforced aluminum-based composite with metal - Google Patents
Method for connecting carbon fiber reinforced aluminum-based composite with metal Download PDFInfo
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000002131 composite material Substances 0.000 title claims abstract description 55
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 54
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 40
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 40
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 35
- 239000002184 metal Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000011159 matrix material Substances 0.000 claims abstract description 45
- 239000000463 material Substances 0.000 claims abstract description 24
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011812 mixed powder Substances 0.000 claims abstract description 10
- 238000000498 ball milling Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims description 15
- 229910010038 TiAl Inorganic materials 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 9
- 239000000956 alloy Substances 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims 2
- 229960004643 cupric oxide Drugs 0.000 claims 2
- 238000007789 sealing Methods 0.000 claims 1
- 238000001291 vacuum drying Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 150000002739 metals Chemical class 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000010406 interfacial reaction Methods 0.000 abstract description 3
- 238000003860 storage Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 239000010953 base metal Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 239000012783 reinforcing fiber Substances 0.000 description 3
- 238000005476 soldering Methods 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000011156 metal matrix composite Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000003832 thermite Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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Abstract
一种连接碳纤维增强铝基复合材料与金属的方法，它涉及一种复合材料与金属的方法。本发明要解决传统焊接方法整体加热温度高，导致增强相碳纤维与铝之间发生严重的界面反应，恶化母材性能的问题。方法为：一、称取铝粉、和氧化铜粉混合，球磨后，得到混合粉末；二、将混合粉末制成相对密度为60%~80%且厚度为1~3mm的中间层，密封保存；三、将中间层置于碳纤维增强铝基复合材料与金属之间装配成“三明治”，在压力为5MPa的条件下，加热至500℃，并保温5~10min，随炉冷却至室温。本发明在500℃即可实现碳纤维增强铝基复合材料与金属的连接，接头强度可达50.7MPa。本发明应用于铝基复合材料与金属连接领域。
A method for connecting carbon fiber reinforced aluminum matrix composite material and metal relates to a method for composite material and metal. The invention solves the problem that the traditional welding method has a high overall heating temperature, which leads to serious interfacial reaction between the reinforced phase carbon fiber and aluminum, and deteriorates the performance of the base material. The method is as follows: 1. Weigh aluminum powder and mix it with copper oxide powder. After ball milling, the mixed powder is obtained; 2. Make the mixed powder into an intermediate layer with a relative density of 60%~80% and a thickness of 1~3mm, and seal it for storage. ; 3. Put the middle layer between the carbon fiber reinforced aluminum matrix composite material and the metal to assemble into a "sandwich". Under the condition of a pressure of 5MPa, heat it to 500°C, keep it warm for 5~10min, and cool it to room temperature with the furnace. The invention can realize the connection between the carbon fiber reinforced aluminum matrix composite material and the metal at 500°C, and the joint strength can reach 50.7MPa. The invention is applied to the field of connecting aluminum-based composite materials and metals.
Description
技术领域 technical field
本发明涉及一种复合材料与金属的方法。The present invention relates to a method of composite material and metal.
背景技术 Background technique
铝基复合材料具有高的比强度、比刚度、轴向拉伸强度和耐磨性，优异的耐高温性能和低的热膨胀系数，良好的导电、导热性、抗疲劳性，以及在潮湿或辐射环境下良好的尺寸稳定性等优点，是一种理想的轻质高强材料。碳纤维增强铝基复合材料密度小于铝合金，模量却比铝合金高2~4倍，在250℃时其抗拉强度仍能保持室温抗拉强度的81%，其疲劳强度比铝合金高38%。制成的构件具有质量轻、刚性好、较小的壁厚、较高的稳定性，可大大提高设备容量和装载能力。用碳纤维增强铝基复合材料制成的卫星抛物面天线骨架，热膨胀系数低、导热性好，可在较大温度范围内保持其尺寸稳定，使卫星抛物面天线的增益效率提高4倍。DWA公司用石墨纤维增强铝基复合材料为NASA和Lockheed公司制造卫星上的波导管。用这种材料制成的波导管不但轴向刚度高、膨胀系数低、导电性能好，而且比原用石墨/环氧一铝层复合制成的波导管轻30%。随着C/Al复合材料工程化应用进展的加快，材料自身及与其它材料之间的连接问题已变得越来越重要。Aluminum matrix composites have high specific strength, specific stiffness, axial tensile strength and wear resistance, excellent high temperature resistance and low thermal expansion coefficient, good electrical conductivity, thermal conductivity, fatigue resistance, and good resistance to moisture or radiation It is an ideal lightweight and high-strength material due to its good dimensional stability in the environment. The density of carbon fiber reinforced aluminum matrix composite is lower than that of aluminum alloy, but its modulus is 2~4 times higher than that of aluminum alloy. At 250°C, its tensile strength can still maintain 81% of the tensile strength at room temperature, and its fatigue strength is 38% higher than that of aluminum alloy. %. The manufactured components have light weight, good rigidity, small wall thickness and high stability, which can greatly improve equipment capacity and loading capacity. The satellite parabolic antenna skeleton made of carbon fiber reinforced aluminum matrix composite material has low thermal expansion coefficient and good thermal conductivity, and can maintain its dimensional stability in a large temperature range, increasing the gain efficiency of the satellite parabolic antenna by 4 times. DWA uses graphite fiber reinforced aluminum matrix composites to manufacture waveguides on satellites for NASA and Lockheed. The waveguide made of this material not only has high axial stiffness, low expansion coefficient, and good electrical conductivity, but also is 30% lighter than the original waveguide made of graphite/epoxy-aluminum layer composite. With the acceleration of the engineering application of C/Al composite materials, the connection between the material itself and other materials has become more and more important.
纤维增强金属基复合材料由基体金属及增强纤维组成，焊接这种复合材料的难点在于，在较高的温度下，金属基复合材料中的基体与增强纤维之间通常是热力学不稳定的，两者的接触界面上易发生化学反应，生成对材料性能不利的脆性相，这种反应通常称为界面反应。碳在固态和液态铝中的溶解度都不大，固溶度为0.015％；而在800℃、1000℃、1100℃和1200℃时的溶解度分别为0.1％、0.14％、016％和0.32％。在室温到1670℃的温度范围内，Al与C反应生成Al4C3的标准生成自由能都为负值。因此，铝与碳在热力学上是不相容的，它们在低温下已开始反应，只是速度非常缓慢，随着温度的上升，反应越来越剧烈，生成的Al4C3量也越来越多。两者明显发生作用的温度根据基体成分和碳纤维结构的不同而不同，约在400℃～500℃之间。焊接温度在该范围之上的焊接方法均会引起明显的界面反应。Al4C3为脆性针状组织，可使基体与增强纤维之间的界面强度剧烈下降，严重恶化母材的性能。目前，对于纤维增强铝基复合材料的连接主要集中在电弧焊、钎焊以及扩散焊等方法的研究，然而电弧焊由于熔池温度较高、加热面积较大，会导致增强相与基体发生严重的界面反应；扩散焊由于连接温度高、加热时间长，也同样会导致界面反应的大面积发生；钎焊中的软钎焊虽然可以实现纤维增强铝基复合材料的连接，但软钎料焊接的接头非常脆，冷却过程中就可能发生断裂。本发明提出一种可以实现碳纤维增强铝基复合材料与金属的连接方法，连接质量较高，使碳纤维增强铝基复合材料与金属间达到很好的冶金结合，同时也不会恶化母材的性能。Fiber-reinforced metal matrix composites are composed of matrix metal and reinforcing fibers. The difficulty of welding such composites is that at higher temperatures, the relationship between the matrix and reinforcing fibers in metal matrix composites is usually thermodynamically unstable. The chemical reaction is easy to occur on the contact interface of the material, forming a brittle phase that is unfavorable to the material performance. This reaction is usually called an interface reaction. The solubility of carbon in solid and liquid aluminum is not large, the solid solubility is 0.015%; while the solubility at 800°C, 1000°C, 1100°C and 1200°C is 0.1%, 0.14%, 016% and 0.32%, respectively. In the temperature range from room temperature to 1670°C, the standard free energy of formation of Al 4 C 3 from the reaction of Al and C is negative. Therefore, aluminum and carbon are thermodynamically incompatible. They have started to react at low temperature, but the speed is very slow. As the temperature rises, the reaction becomes more and more violent, and the amount of Al 4 C 3 produced is also increasing. many. The temperature at which the two obviously interact varies depending on the matrix composition and carbon fiber structure, and is between 400°C and 500°C. Soldering methods with a soldering temperature above this range will cause obvious interfacial reactions. Al 4 C 3 is a brittle acicular structure, which can sharply reduce the interface strength between the matrix and the reinforcing fiber, and seriously deteriorate the performance of the base material. At present, the research on the connection of fiber reinforced aluminum matrix composites mainly focuses on methods such as arc welding, brazing and diffusion welding. interface reaction; diffusion welding due to high connection temperature and long heating time will also lead to a large area of interface reaction; although soft soldering in brazing can realize the connection of fiber reinforced aluminum matrix composites, but solder welding The joints are very brittle and may break during cooling. The invention proposes a connection method that can realize the connection between carbon fiber reinforced aluminum matrix composite material and metal. The connection quality is high, so that the carbon fiber reinforced aluminum matrix composite material and the metal can achieve a good metallurgical bond, and at the same time, the performance of the base material will not be deteriorated. .
发明内容 Contents of the invention
本发明的目的是为了解决传统焊接方法整体加热温度高，导致增强相碳纤维与铝之间发生严重的界面反应，恶化母材性能的问题，而提供一种连接碳纤维增强铝基复合材料与金属的方法。The purpose of the present invention is to solve the problem that the traditional welding method has a high overall heating temperature, which leads to serious interfacial reaction between the reinforced phase carbon fiber and aluminum, and deteriorates the performance of the base material, and provides a method for connecting carbon fiber reinforced aluminum matrix composite materials and metals. method.
本发明的一种连接碳纤维增强铝基复合材料与金属的方法是按以下步骤进行的：一、按重量份数将54~58份的铝粉、8~10份的镍粉和33~37份的氧化铜粉混合均匀，置于球磨罐内，按球料质量比为5:1的比例放入磨球，在氩气保护的条件下，以300~500r/min的速度球磨2~3h，得到混合粉末；二、将步骤一获得的混合粉末压制成相对密度为60%~80%且厚度为1~3mm的中间层压坯，密封保存；三、将步骤二获得的中间层压坯置于碳纤维增强铝基复合材料与金属之间装配成“三明治”式装配件，然后将装配件夹好放到真空炉内，在压力为5MPa的条件下，加热至500℃，并保温5~10min，然后随炉冷却至室温，即完成碳纤维增强铝基复合材料与金属的连接。A method for connecting carbon fiber reinforced aluminum matrix composites and metals of the present invention is carried out according to the following steps: 1. 54 to 58 parts of aluminum powder, 8 to 10 parts of nickel powder and 33 to 37 parts of Mix the copper oxide powder evenly, put it in the ball mill tank, put the ball into the ball at a mass ratio of 5:1, and mill it at a speed of 300~500r/min for 2~3h under the protection of argon. Obtain the mixed powder; 2. Compress the mixed powder obtained in
本发明的优点：一、本发明利用传统的铝热放映原理，制备了Al-Ni-CuO粉末放热中间层，在500℃即可实现碳纤维增强铝基复合材料与金属的连接，同时不会恶化复合材料的性能，很好的保持了母材的各种优良特性。二、利用本发明的中间层进行碳纤维增强铝基复合材料与金属的连接，中间层与两侧母材达到很好的冶金结合，连接质量好，接头强度可达50.7MPa。本发明提供了一种连接质量较好的、可以实现碳纤维增强铝基复合材料与金属连接的方法，同时不会恶化母材的性能。Advantages of the present invention: 1. The present invention utilizes the traditional thermite projection principle to prepare the exothermic interlayer of Al-Ni-CuO powder, which can realize the connection of carbon fiber reinforced aluminum matrix composite material and metal at 500°C without Deteriorating the performance of the composite material, it maintains various excellent properties of the base material. 2. Using the intermediate layer of the present invention to connect the carbon fiber reinforced aluminum matrix composite material and the metal, the intermediate layer and the parent materials on both sides achieve good metallurgical bonding, the connection quality is good, and the joint strength can reach 50.7MPa. The invention provides a method with good connection quality, which can realize the connection between the carbon fiber reinforced aluminum matrix composite material and the metal without deteriorating the performance of the parent material.
本发明中采用自制的粉末中间层，由Ni粉、Al粉、CuO粉按一定的重量配比组成，压制成1~2mm厚的圆柱体，放置在C/Al复合材料与金属之间，装配成“三明治”式结构，放入真空炉中加热，同时施加一定的压力，加热到一定的温度，并保温一段时间，实现连接二者的连接。本发明利用自制的粉末中间层中的Al粉与Ni、CuO粉反应放出大量的热，使中间层中的铝熔化，并局部熔化与中间层接触的C/Al复合材料与金属，使二者发生冶金结合，实现连接。传统的连接方法，由于整体的加热温度均要达到铝的熔点，因此不可避免破坏了Cf/Al符合材料的综合性能。而本发明则利用了Al与CuO在较低的温度下（500℃的条件即可反应），并伴随产生大量的热量，同时Al与Ni在较低的温度下（600℃左右）也会反生反应，并放出大量的热量，与两侧母材很好的连接，采用这种自行配置的粉末，很好的降低了整体炉中加热温度，达到很好的连接效果。而在500℃左右，C与Al的界面反应较微弱，不会影响C/Al复合材料的性能，很好的保持了母材的各种优良特性。In the present invention, the self-made powder middle layer is adopted, which is composed of Ni powder, Al powder and CuO powder according to a certain weight ratio, pressed into a cylinder with a thickness of 1~2mm, placed between the C/Al composite material and the metal, and assembled Form a "sandwich" structure, put it into a vacuum furnace to heat, apply a certain pressure at the same time, heat to a certain temperature, and keep it warm for a period of time to realize the connection between the two. The present invention utilizes the Al powder in the self-made powder intermediate layer to react with Ni and CuO powder to release a large amount of heat, so that the aluminum in the intermediate layer is melted, and the C/Al composite material and metal in contact with the intermediate layer are locally melted, so that both Metallurgical bonding occurs to achieve a connection. In the traditional connection method, since the overall heating temperature must reach the melting point of aluminum, the comprehensive performance of the C f /Al composite material will inevitably be destroyed. However, the present invention utilizes the reaction between Al and CuO at a relatively low temperature (the condition of 500°C) and the accompanying generation of a large amount of heat. The reaction occurs, and a large amount of heat is released, and it is well connected with the base materials on both sides. The use of this self-configured powder reduces the heating temperature in the overall furnace and achieves a good connection effect. At about 500°C, the interface reaction between C and Al is relatively weak, which will not affect the performance of the C/Al composite material, and maintains various excellent properties of the base metal.
附图说明 Description of drawings
图1为连接碳纤维增强铝基复合材料与TiAl的焊缝宏观形貌图；其中，图中左侧为碳纤维增强铝基复合材料，中间为反应后的中间层，右侧为TiAl合金；Figure 1 is a macroscopic view of the weld seam connecting carbon fiber reinforced aluminum matrix composite material and TiAl; wherein, the left side of the figure is the carbon fiber reinforced aluminum matrix composite material, the middle is the middle layer after reaction, and the right side is the TiAl alloy;
图2为碳纤维增强铝基复合材料与TiAl合金装配示意图；其中，1为碳纤维增强铝基复合材料，2为中间层压坯，3为TiAl合金；Figure 2 is a schematic diagram of the assembly of a carbon fiber reinforced aluminum matrix composite material and a TiAl alloy; wherein, 1 is a carbon fiber reinforced aluminum matrix composite material, 2 is an intermediate layer compact, and 3 is a TiAl alloy;
图3为碳纤维增强铝基复合材料与TiAl合金连接后的剪切强度测试试验示意图；其中，1为碳纤维增强铝基复合材料，2为中间层，3为TiAl合金，4为卡具。Figure 3 is a schematic diagram of the shear strength test after the carbon fiber reinforced aluminum matrix composite material is connected with the TiAl alloy; wherein, 1 is the carbon fiber reinforced aluminum matrix composite material, 2 is the middle layer, 3 is the TiAl alloy, and 4 is the fixture.
具体实施方式 Detailed ways
本发明技术方案不局限于以下所列举具体实施方式，还包括各具体实施方式间的任意组合。The technical solution of the present invention is not limited to the specific embodiments listed below, but also includes any combination of the specific embodiments.
具体实施方式一：本实施方式的一种连接碳纤维增强铝基复合材料与金属的方法是按以下步骤进行的：一、按重量份数将54~58份的铝粉、8~10份的镍粉和33~37份的氧化铜粉混合均匀，置于球磨罐内，按球料质量比为5:1的比例放入磨球，在氩气保护的条件下，以300~500r/min的速度球磨2~3h，得到混合粉末；二、将步骤一获得的混合粉末压制成相对密度为60%~80%且厚度为1~3mm的中间层压坯，密封保存；三、将步骤二获得的中间层压坯置于碳纤维增强铝基复合材料与金属之间装配成“三明治”式装配件，然后将装配件夹好放到真空炉内，在压力为5MPa的条件下，加热至500℃，并保温5~10min，然后随炉冷却至室温，即完成碳纤维增强铝基复合材料与金属的连接。Specific embodiment one: a kind of method of connecting carbon fiber reinforced aluminum matrix composite material and metal of this embodiment is carried out according to the following steps: 1, the aluminum powder of 54～58 parts by weight, the nickel powder of 8～10 parts Powder and 33~37 parts of copper oxide powder are mixed evenly, placed in the ball mill tank, and the ball is put into the ball at a mass ratio of 5:1. Under the condition of argon protection, the Speed ball milling for 2-3 hours to obtain mixed powder; 2. Press the mixed powder obtained in
本实施方式的优点：一、本实施方式利用传统的铝热放映原理，制备了Al-Ni-CuO粉末放热中间层，在500℃即可实现碳纤维增强铝基复合材料与金属的连接，同时不会恶化复合材料的性能，很好的保持了母材的各种优良特性。二、利用本实施方式的中间层进行碳纤维增强铝基复合材料与金属的连接，中间层与两侧母材达到很好的冶金结合，连接质量好，接头强度可达50.7MPa。本实施方式提供了一种连接质量较好的、可以实现碳纤维增强铝基复合材料与金属连接的方法，同时不会恶化母材的性能。Advantages of this embodiment: 1. This embodiment uses the traditional thermite projection principle to prepare an exothermic interlayer of Al-Ni-CuO powder, which can realize the connection between carbon fiber reinforced aluminum matrix composite material and metal at 500°C, and at the same time It will not deteriorate the performance of the composite material, and well maintain various excellent properties of the base material. 2. The middle layer of this embodiment is used to connect the carbon fiber reinforced aluminum matrix composite material and the metal. The middle layer and the parent materials on both sides achieve good metallurgical bonding, the connection quality is good, and the joint strength can reach 50.7MPa. This embodiment provides a method with better connection quality, which can realize the connection between the carbon fiber reinforced aluminum matrix composite material and the metal, and at the same time, the performance of the base material will not be deteriorated.
具体实施方式二：本实施方式与具体实施方式一不同的是：步骤一所述的铝粉为325~1000目，镍粉为325~1000目，氧化铜粉为325~1000目。其它与具体实施方式一相同。Embodiment 2: This embodiment differs from
具体实施方式三：本实施方式与具体实施方式一至二不同的是：步骤二所述的相对密度是在20℃测得的相对密度。其它与具体实施方式一至二相同。Embodiment 3: This embodiment differs from
具体实施方式四：本实施方式与具体实施方式一至三之一不同的是：步骤三所述的金属为TiAl合金。其它与具体实施方式一至三之一相同。Embodiment 4: The difference between this embodiment and one of
通过以下试验验证本发明的效果：Verify effect of the present invention by following test:
本试验的一种连接碳纤维增强铝基复合材料与金属的方法是按以下步骤进行的：一、称取5.6g的铝粉、0.9g的镍粉和3.5g的氧化铜粉混合均匀，置于球磨罐内，按球料质量比为5:1比例放入磨球，在氩气保护的条件下，以300r/min速度球磨2.5h，得到混合粉末；二、将步骤一获得的混合粉末压制成相对密度为70%且厚度为1mm的中间层，然后密封保存；三、将步骤二获得的中间层置于碳纤维增强铝基复合材料（购买自哈工大材料学院特种材料研究所）与TiAl合金之间装配成“三明治”式装配件（示意图如图2所示），然后将装配件夹好放到真空炉内，在压力为5MPa的条件下，加热至500℃，并保温10min，然后随炉冷却至室温，即完成碳纤维增强铝基复合材料与TiAl合金的连接。A method for connecting carbon fiber reinforced aluminum matrix composites and metals in this test is carried out as follows: 1. Take 5.6g of aluminum powder, 0.9g of nickel powder and 3.5g of copper oxide powder and mix them evenly, place In the ball milling tank, put the balls into the ball-material mass ratio of 5:1, and under the protection of argon, ball mill at a speed of 300r/min for 2.5h to obtain the mixed powder; 2. Press the mixed powder obtained in
本试验的碳纤维增强铝基复合材料为Cf/Al复合材料，购买自哈工大材料学院特种材料研究所。The carbon fiber reinforced aluminum matrix composite material used in this test is a C f /Al composite material purchased from the Institute of Special Materials, School of Materials, Harbin Institute of Technology.
本试验的相对密度是指中间层压坯的相对密度，是在20℃下测得的。The relative density in this test refers to the relative density of the interlayer compact, which is measured at 20°C.
对本试验连接后的材料在扫描电子显微镜下进行背散射观察，结果如图1所示，由图1可知，中间层与两侧母材达到很好的冶金结合，没有明显的缺陷生成，形成了完整的接头。对接头进行剪切强度测试，测试试验示意图如图3所示，接头的抗剪强度可到30.07MPa，达到母材强度额61.4%。The backscattering observation of the materials connected in this test was carried out under the scanning electron microscope. The results are shown in Figure 1. From Figure 1, it can be seen that the middle layer and the base metal on both sides have achieved a good metallurgical bond, and no obvious defects have been formed. Complete joints. The shear strength test was carried out on the joint. The schematic diagram of the test test is shown in Figure 3. The shear strength of the joint can reach 30.07MPa, reaching 61.4% of the strength of the base metal.
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