According to reaction type different, plasma cleans a technology to be able to divide it is two kinds big: Plasma physics is cleaned, the bombard depart contaminant that passes active particle and high-energy ray namely. The response that plasma chemistry is cleaned is a too active particle and foreign matter element will evaporate with purify contaminant.
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(The it is certain to clean means to have influence that 1) stimulates system of frequency reciprocity ion. For example, ultrasonic plasma (arouse frequency, 40kHz) reaction of main generation physics. Microwave plasma (arouse frequency to be 2.45GHz) the major reaction of generation is chemical reaction. Radio frequency plasma (arouse frequency, 13.56MHz) involve physics and chemical reaction.
(The sort that the sort of 2) job gas cleans to plasma also has certain effect. For example, the inert gase Ar2, N2 plasma that inspires generation basically is used at physics to clean, pass the surface of means cleanness material of bombard. The reactivity gas such as O2, H2 arouses the plasma of generation, basically use at chemistry to clean. Active freedom base with contaminant (basically be a hydrocarbon) the chemical reaction between produces young member, be like carbon monoxide, carbon dioxide and water. Move from data surface except.
(The sort that 3) plasma cleans has certain effect to cleaning the effect. Plasma physics cleans the surface roughness that can raise material appearance, conduce to the adherent power that enhances material appearance. Plasma chemistry cleans what can raise material appearance significantly to contain the oxygen, active that contains the type such as nitrogen base round, conduce to the wetability that improves material appearance.
Plasma cleans a technology to be analysed in the application of composite material domain
Since plasma cleans a technology to appear oneself, wait for the rapid development of the industry as the electron, its application is added gradually much. Current, plasma cleans wide already application to be mixed at semiconductor photoelectricity industry, get popularize and be used in the domain of a lot of technology such as car, aerospace, medicine, adornment. In recent years, plasma cleans a technology to be in the activation of polymer surface, electron yuan the production of parts of an apparatus, plastic the improvement that sticks consistence of received processing, biology, biology pollutes prevent, of the production that microwave is in charge of, nice mechanical spare parts clean waited for a respect to receive wide application. Plasma of face key introduction cleans craft to be in the applied foreground of composite material domain.
One, the exterior felt performance that improves composite material.
The successive fiber such as carbon fiber, fragrant black silk ribbon has weight light, intensity tall, thermal stability good, fatigue resistance can be exceedingly good wait for apparent characteristic. They are used at enhancing hot solid gender and thermoplastic colophony radical composite material. Finished product applies extensively already at the domain such as plane, weaponry, car, sports, electric equipment. However, business has an organic coat normally with fiber material surface, this is to be in in composite material in the process of preparation, it can become weak interface layer, affect colophony and result of fibrous interface felt badly. Accordingly, before preparation composite material, need adopts certain processing technique its purify.
Plasma cleans technical use, prevent chemical dissolvent effectively to be opposite the harm of material noumenon function. Washing material face while, can introduce a variety of active and luscious groups, increase exterior surface roughness, the freedom that improves fiber appearance can, improve the felt function between colophony and fiber photograph interface effectively, improved the integral performance of composite material.
2, the performance that improves composite material workmanship.
Composite material liquid state shapes technology (LCM) basically include colophony to deliver moulding (RTM) , vacuum assists colophony to deliver moulding (VARTM) , vacuum assists colophony to inject (VARI) permeate with colophony film (RFI) etc shape craft. The common characteristic of this kind of craft is fiber prefab club puts mould pitch, enter liquid state colophony in the action chip in of pressure next, make fiber infiltrates adequately, get what wanting a product through the working procedure such as solidify, drawing of patterns next, have investment little, efficiency tall, quality is good wait for an advantage. However, needing settlement problem is, most LCM technology is not good to effect of fibrous colophony macerate, the product puts the appearance such as interiorly space and exterior dry spot. This shows, colophony is right of fiber surface protect wet action to will affect LCM to shape directly craft and product function. Accordingly, the reason that can consider to use plasma to clean a technology to improve fiber appearance turns performance, raise fiber the surface in prefabricated component is free can, make colophony is below same craft condition (pressure field, temperature field) adequately macerate. Fiber surface, raise the uniformity of macerate, improve the technical properties that composite material liquid state shapes.
3, the exterior coating performance that improves composite material
Of composite material shape the need in the process uses agent of drawing of patterns, after solidify shapes, depart effectively in order to ensure its are in with the mould. However, the use of agent of drawing of patterns is met inevitably the agent of drawing of patterns that keeps excessive in the filmy surface of composite material, cause pollution, layer of a weak interface arises in the surface, make coating falls off easily after besmear is installed. Cleaning a method traditionally is to use acetone to wait to organic dissolvent wipes the surface or be used first abrade hind the methodological purify remain that clean is in the agent of drawing of patterns of composite material surface. However, used two kinds of afore-mentioned methods to introduce the use of organic dissolvent not only, and cause a large number of dust pollution as a result of abrade process, cause serious effect to the environment, endanger the person security that handles personnel. After technology of plasma of classics green environmental protection is cleaned, it is better to wait for Tu Fu to add up to material surface to be able to be obtained can besmear outfit condition, raised the dependability of coating, can prevent coating effectively to fall off to wait for a problem with blemish. Level off of the surface after coating is successive, wait for blemish without flow mark, stoma, coating is adherent force is groovier clean have rise significantly, detect through GB/T 9286 eventuate one class, accord with project application standard.
4, raise composite material between many spare partses stick receive performance
In certain applying, need receives part of a few composite material craft join to become a whole through sticking. The process is here medium, if composite material surface is polluted, smooth or chemistry is inert, finish not easily through adhesive bonding compound. Between data part tie calm course. Traditional method is the surface roughness that uses physical grinding to increase composite material spare parts to combine an aspect, improve the combinative performance between composite material spare parts thereby. But this kind of method is in generation dust pollution while, achieve the goal that raises workpiece surface surface roughness equably not easily, and cause composite material workpiece easily to the surface is out of shape and be injured, affect workpiece to combine the function of the face thereby. Accordingly, can consider to use technology of simple manageable plasma, clean the exterior contaminant of composite material spare parts effectively, improve physico-chemical performance of the surface at the same time, obtain finally stick goodly receive performance.
Last word
Plasma cleans skill to be applied mediumly in complex material category, it is the interfacial function that is used at improving complex material no matter, farther liquid shapes the embellish wet function with the outside to fiber colophony in craft, still use at eradicating to make an appearance pollute a layer to pack a function with farther besmear, or it is to improve many control an adhesive bonding function between, its dependability is to rely on microtherm plasma mostly the improvement of outside to the data physics and chemical function the effect, layer of purify weak interface, or it is to add surface roughness, enhance the wet sex between two appearance and felt function thereby.
As the development of microtherm plasma technology, often control the development of equipment of online and successive plasma below the condition especially, clean cost to drop ceaselessly, clean efficiency to be able to rise further. Plasma cleans technical itself to provide in the right way to machine all sorts of material, advantage such as green environmental protection. Accordingly, while essence of life refines manufacturing consciousness to rise stage by stage, advanced clean a technology to be able to gain ground more necessarily in the application of composite material domain.
