CN103320724B - Mo micro-nanowire/CuZnAl memory alloy composite material and preparation method thereof - Google Patents
Mo micro-nanowire/CuZnAl memory alloy composite material and preparation method thereof Download PDFInfo
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Abstract
The invention provides a Mo micro-nanowire/CuZnAl memory alloy composite material and a preparation method thereof. The preparation method comprises the following steps: permeating Mo powder into a CuZnAl composite material plate by stirring friction to obtain a Mo/CuZnAl composite material; and sequentially carrying out rolling and wire drawing on the Mo/CuZnAl composite material to obtain the Mo micro-nanowire/CuZnAl memory alloy composite material. The Mo micro-nanowire/CuZnAl memory alloy composite material is prepared by the preparation method. By adopting the stirring friction+rolling+wire drawing preparation method, the Mo micro-nanowire in the composite material is uniformly distributed in the CuZnAl shape memory alloy base in the axial direction.
Description
Technical field
The present invention relates to a kind of Mo micro-nano rice noodles/CuZnAl memory alloy composite material and preparation method thereof, particularly relating to a kind of is wild phase with Mo, with CuZnAl matrix material for matrix, the memory alloy composite material utilizing mixing yoghurt technology to prepare, belongs to metal composite technical field.
Background technology
Metal-base composites has higher specific modulus, specific tenacity, excellent mechanical behavior under high temperature and good wear resistance, features such as dimensional stability, antifatigue, thermal expansivity are little and be widely used in the fields such as aerospace, automobile, military affairs.Wherein, the features such as CuZnAl base marmem matrix material Yin Qiyi processes, with low cost, and be subject to common concern both domestic and external.But the mechanical property of CuZnAl base marmem matrix material is still to be improved.
Nano wire has higher intensity, can be used as the wild phase of metal-base composites.Utilize the method for traditional mechanically mixing hot pressing to prepare nanowire composite, there is following problem: nano wire disperse in the base uneven, cannot oriented alignment, interface cohesion is undesirable, volume fraction is lower.
Therefore, how to develop a kind of CuZnAl memory alloy composite material using nano wire as wild phase and preparation method thereof, be still one of this area problem demanding prompt solution.
Summary of the invention
For solving the problems of the technologies described above, the object of the present invention is to provide a kind of Mo micro-nano rice noodles/CuZnAl memory alloy composite material and preparation method thereof.The present invention adopts the preparation method of agitating friction+rolling+wire drawing, and the Mo micro-nano rice noodles in matrix material are evenly distributed in CuZnAl shape memory alloy base vertically.
For reaching above-mentioned purpose, the invention provides a kind of preparation method of Mo micro-nano rice noodles/CuZnAl memory alloy composite material, it comprises the following steps:
Adopt mixing yoghurt that Mo powder is incorporated in CuZnAl composite board, obtain Mo/CuZnAl matrix material;
Described Mo/CuZnAl matrix material is rolled successively, hot candied, obtain described Mo micro-nano rice noodles/CuZnAl memory alloy composite material.
In above-mentioned preparation method, preferably, the rotating speed of the stirring-head of described mixing yoghurt is 200-2000 rev/min, and gait of march is 20-600 mm/min, and the number of times of mixing yoghurt is 2-6 passage.Mixing yoghurt is adopted to be incorporated in CuZnAl composite board by Mo powder, without the need to carrying out perforate or fluting to CuZnAl composite board in advance, but Mo powder is loaded the equipment (friction stir welding of mixing yoghurt, it can be the friction stir welding that this area routine uses) in, make it be evenly distributed in CuZnAl composite board with stirring-head.And after first time carries out mixing yoghurt, the mixing yoghurt of all the other passages still can continue to add Mo powder, and is carry out mixing yoghurt to the region of the CuZnAl composite board being distributed with Mo powder.
In above-mentioned preparation method, preferably, the particle diameter of described Mo powder is 1 μm-5 μm.
In above-mentioned preparation method, described CuZnAl composite board is the common alloy in this area, and the preparation technology of the CuZnAl composite board that its preparation method can adopt usually according to this area carries out.Preferably, the thickness of described CuZnAl composite board is 8mm-15mm; Be more preferably 10mm.
In above-mentioned preparation method, preferably, the mass ratio of described Mo powder and described CuZnAl composite board is 1:100-10:100; Be more preferably 1:20.
In the preparation process in accordance with the present invention, when carrying out mixing yoghurt, can by etc. the Mo of shaft-like strengthen particle compound and enter in CuZnAl shape memory alloy base, form matrix material initial blank, and then to this matrix material initial blank successively rolling and hot candied process.Wherein, described rolling and wire drawing can be all rolling and the wire drawing of multi-pass; Described rolling can be hot rolling or cold rolling; Described wire drawing can be hot drawing or cold-drawn.And, described rolling and the hot candied equipment and process method adopted can be all conventional equipment and method when plastic working is carried out to metal composite in this area, for obtaining the diameter of different section bars and different Mo micro-nano rice noodles, and the various adjustment that rolling and hot candied processing parameter and processing step etc. are carried out and control all to carry out for the processing method usually adopted according to this area.Effectively can be controlled the diameter of Mo micro-nano rice noodles in prepared matrix material by rolling and wire drawing process, thus different reinforced effects can be reached.
In above-mentioned preparation method, preferably, the thickness of the Mo/CuZnAl matrix material after rolling is 2mm-5mm, is more preferably 2mm.Generally speaking, the Mo/CuZnAl matrix material obtained after rolling is Mo/CuZnAl composite board, and described thickness is the thickness of sheet material.
In above-mentioned preparation method, after being rolled, all need to carry out anneal at every turn.Preferably, the annealing temperature in the described operation of rolling is 630 DEG C-700 DEG C, and the time is 10-30 minute; More preferably, annealing temperature is 630 DEG C, and the time is 10 minutes.
In above-mentioned preparation method, preferably, the diameter of the Mo micro-nano rice noodles/CuZnAl memory alloy composite material after described wire drawing makes wire drawing is 0.2mm-1mm.Generally speaking, the Mo micro-nano rice noodles/CuZnAl memory alloy composite material obtained after wire drawing is composite silk material, and described diameter is the diameter of a material.
In above-mentioned preparation method, after carrying out wire drawing, all need to carry out anneal at every turn.Preferably, the annealing temperature in described wire drawing process is 630 DEG C-700 DEG C, and the time is 10-30 minute; More preferably, annealing temperature is 630 DEG C, and the time is 10 minutes.Carry out annealing at this temperature of 630 DEG C-700 DEG C and effectively can promote the further plastic working of material.
The present invention adopts Mo effectively can improve the intensity of matrix material as wild phase, and Mo has high fusing point, do not react with CuZnAl, in the matrix material prepared, two combine well, the volume fraction of wild phase controls by mixing yoghurt passage, and in the matrix material of preparation, micro-nano rice noodles are arranged vertically.
The present invention also provides a kind of Mo micro-nano rice noodles/CuZnAl memory alloy composite material, and it is preparation-obtained by the preparation method of above-mentioned Mo micro-nano rice noodles/CuZnAl memory alloy composite material.
In above-mentioned memory alloy composite material, preferably, the diameter of described Mo micro-nano rice noodles is 20nm-2 μm.
The shaft-like metal simple-substance Mo particles such as employing of the present invention are as wild phase, CuZnAl shape memory alloy material is as matrix, by mixing yoghurt technology, Mo particle compound is entered in CuZnAl memorial alloy matrix, by follow-up rolling, hot candied viscous deformation processing, the Mo particle of shaft-like such as to make extend in matrix internal strain, form the wire wild phase of micro-nano scale, prepared and be uniformly dispersed, along the Mo micro-nano rice noodles/CuZnAl memory alloy composite material of material axial arranging.
Accompanying drawing explanation
Fig. 1 is the Mo micro-nano rice noodles/CuZnAl memory alloy composite material vertical section backscattered electron photo of embodiment 1.
Fig. 2 is the Mo micro-nano rice noodles/CuZnAl memory alloy composite material cross section backscattered electron photo of embodiment 1.
Fig. 3 is the sem energy spectrum analysis result of the gray area in Fig. 2.
Fig. 4 is the sem energy spectrum analysis result of the white portion in Fig. 2.
Fig. 5 is the stress-strain curve of pure CuZnAl matrix material.
Fig. 6 is the stress-strain curve of the Mo micro-nano rice noodles/CuZnAl memory alloy composite material of embodiment 1.
Fig. 7 is the Mo micro-nano rice noodles/CuZnAl memory alloy composite material vertical section backscattered electron photo of embodiment 2.
Fig. 8 is the Mo micro-nano rice noodles/CuZnAl memory alloy composite material cross section backscattered electron photo of embodiment 2.
Embodiment
The preparation method of Mo micro-nano rice noodles/CuZnAl memory alloy composite material of the present invention can comprise the following steps:
(1) the CuZnAl composite board that the Mo powder of particle diameter 1 μm-5 μm and thickness are 8mm-15mm is chosen, mixing yoghurt is adopted to be incorporated in CuZnAl composite board by described Mo powder, the rotating speed of the stirring-head of described mixing yoghurt is 200-2000 rev/min, gait of march is 20-600 mm/min, the number of times of mixing yoghurt is 2-6 passage, obtains Mo/CuZnAl matrix material;
(2) described Mo/CuZnAl matrix material is carried out to the rolling of multi-pass, and the temperature of the anneal of carrying out after each rolling is 630 DEG C-700 DEG C, time is 10-30 minute, the thickness making the Mo/CuZnAl matrix material after rolling is 2mm-5mm, obtains the Mo/CuZnAl matrix material after rolling;
(3) the Mo/CuZnAl matrix material after described rolling is carried out to the wire drawing of multi-pass, and be 630 DEG C-700 DEG C in the temperature of each hot candied rear anneal of carrying out, time is 10-30 minute, according to the silk material diameter of required Mo micro-nano rice noodles/CuZnAl memory alloy composite material and the passage of the wherein diameter adjustment wire drawing of Mo micro-nano rice noodles, obtain described Mo micro-nano rice noodles/CuZnAl memory alloy composite material.
Embodiment 1
The present embodiment provides a kind of Mo micro-nano rice noodles/CuZnAl memory alloy composite material, and it prepares in accordance with the following methods:
(1) the CuZnAl composite board that the Mo powder of particle diameter 2 μm and thickness are 1cm is chosen, mixing yoghurt is adopted to be incorporated in CuZnAl composite board by described Mo powder, the rotating speed of the stirring-head of described mixing yoghurt is 1200 revs/min, gait of march is 400 mm/min, the number of times of mixing yoghurt is 3 passages, obtains Mo/CuZnAl matrix material;
(2) the cold rolling of 5 passages is carried out to described Mo/CuZnAl matrix material, and be 630 DEG C in the temperature of each cold rolling rear carried out anneal, time is 10 minutes, make cold rolling after the thickness of Mo/CuZnAl matrix material be 2mm, obtain cold rolling after Mo/CuZnAl matrix material;
(3) make described cold rolling after Mo/CuZnAl matrix material by Linear cut, obtain the strip Mo/CuZnAl matrix material of cross section 2mm × 2mm;
(4) the strip Mo/CuZnAl matrix material of described cross section 2mm × 2mm is carried out to the cold-drawn of 10 passages, and the temperature of the anneal of carrying out after each cold-drawn is 630 DEG C, time is 10 minutes, obtains Mo micro-nano rice noodles/CuZnAl memory alloy composite material silk material that diameter is 0.2mm.
Fig. 1 is the vertical section backscattered electron photo of these Mo micro-nano rice noodles/CuZnAl memory alloy composite material silk material.Fig. 2 is the cross section backscattered electron photo of these Mo micro-nano rice noodles/CuZnAl memory alloy composite material silk material.As can be seen from Fig. 1 and Fig. 2, the diameter of the Mo micro-nano rice noodles in these Mo micro-nano rice noodles/CuZnAl memory alloy composite material silk material is about 20nm-1 μm, and the volume fraction of Mo micro-nano rice noodles in this matrix material is higher, micro-nano rice noodles are uniformly dispersed and along material axial arranging, and interface cohesion is good.Fig. 3 is the sem energy spectrum analysis result of the gray area in Fig. 2.Fig. 4 is the sem energy spectrum analysis result of the white portion in Fig. 2.Be mainly Mo from the composition of the white portion in Fig. 3 and Fig. 4, Fig. 2, and the composition of gray area is mainly CuZnAl.Fig. 5 is the stress-strain curve of pure CuZnAl composite silk material.Fig. 6 is the stress-strain(ed) curve of Mo micro-nano rice noodles/CuZnAl memory alloy composite material silk material prepared by embodiment 1.Comparison diagram 5 and Fig. 6 known, the yield strength of the matrix material of embodiment 1 is about 450MPa, and breaking tenacity is 690MPa; The yield strength of common pure CuZnAl silk material is 200MPa, and breaking tenacity is 500MPa.It can thus be appreciated that, the yield strength of the Mo micro-nano rice noodles/CuZnAl memory alloy composite material of embodiment 1 and breaking tenacity improve 125% and 38% respectively than the CuZnAl matrix material of non-compound Mo micro-nano rice noodles, and compound Mo micro-nano rice noodles make the mechanical property of CuZnAl shape memory alloy matrix material increase.
Embodiment 2
The present embodiment provides a kind of Mo micro-nano rice noodles/CuZnAl memory alloy composite material, and it prepares in accordance with the following methods:
(1) the CuZnAl composite board that the Mo powder of particle diameter 5 μm and thickness are 1cm is chosen, mixing yoghurt is adopted to be incorporated in CuZnAl composite board by described Mo powder, the rotating speed of the stirring-head of described mixing yoghurt is 1000 revs/min, gait of march is 500 mm/min, the number of times of mixing yoghurt is 2 passages, obtains Mo/CuZnAl matrix material;
(2) the cold rolling of 6 passages is carried out to described Mo/CuZnAl matrix material, and be 630 DEG C in the temperature of each cold rolling rear carried out anneal, time is 10 minutes, make cold rolling after the thickness of Mo/CuZnAl matrix material be 2mm, obtain cold rolling after Mo/CuZnAl matrix material;
(3) make described cold rolling after Mo/CuZnAl matrix material by Linear cut, obtain the strip Mo/CuZnAl matrix material of cross section 2mm × 2mm;
(4) the strip Mo/CuZnAl matrix material of described cross section 2mm × 2mm is carried out to the cold-drawn of 8 passages, and the temperature of the anneal of carrying out after each cold-drawn is 630 DEG C, time is 10 minutes, obtains Mo micro-nano rice noodles/CuZnAl memory alloy composite material silk material that diameter is 0.28mm.
Fig. 7 is the vertical section backscattered electron photo of these Mo micro-nano rice noodles/CuZnAl memory alloy composite material silk material.Fig. 8 is the cross section backscattered electron photo of these Mo micro-nano rice noodles/CuZnAl memory alloy composite material silk material.As can be seen from Fig. 7 and Fig. 8, the diameter of the Mo micro-nano rice noodles in these Mo micro-nano rice noodles/CuZnAl memory alloy composite material silk material is about 50nm-2 μm, and the volume fraction of Mo micro-nano rice noodles in this matrix material is higher, micro-nano rice noodles are uniformly dispersed and along material axial arranging, and interface cohesion is good.
Claims (4)
1. a preparation method for Mo micro-nano rice noodles/CuZnAl memory alloy composite material, it comprises the following steps:
Adopt mixing yoghurt that Mo powder is incorporated in CuZnAl composite board, obtain Mo/CuZnAl matrix material;
Described Mo/CuZnAl matrix material is rolled successively, hot candied, obtain described Mo micro-nano rice noodles/CuZnAl memory alloy composite material;
Wherein, the rotating speed of the stirring-head of described mixing yoghurt is 200-2000 rev/min, and gait of march is 20-600 mm/min, and the number of times of mixing yoghurt is 2-6 passage;
Annealing temperature in the described operation of rolling is 630 DEG C-700 DEG C, and the time is 10-30 minute;
Annealing temperature in described wire drawing process is 630 DEG C-700 DEG C, and the time is 10-30 minute;
The particle diameter of described Mo powder is 1 μm-5 μm;
The thickness of described CuZnAl composite board is 8mm-15mm;
The mass ratio of described Mo powder and described CuZnAl composite board is 1:100-10:100.
2. preparation method according to claim 1, wherein, the thickness of the Mo/CuZnAl matrix material after rolling is 2mm-5mm.
3. Mo micro-nano rice noodles/CuZnAl memory alloy composite material, it is preparation-obtained by the preparation method of the Mo micro-nano rice noodles/CuZnAl memory alloy composite material described in claim 1 or 2.
4. memory alloy composite material according to claim 3, wherein, the diameter of described Mo micro-nano rice noodles is 20nm-2 μm.
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