The technology of coating of gas phase deposit on medical apparatus and instruments and application

The coefficient of friction of 7, the rolled steel coefficient of friction that applies coat is the smallest can achieve 0.

06, also can prevent a spare parts effectively to get stuck dead below the condition that does not have lubricant, the application that goes up in joint especially; Graph layer color has diversity, the sex knowing differentiate of ameliorable appliance, reduce the probability of misapplication; Coating also is appliance metal ability organize the barrier layer of good live thing between with human body character, can prevent the muscle sensitive response to the metal effectively, at the same time coating also can regard report of a kind of interpose as barrier layer, still can make good protective screen to the metal. The coating cent on the phyletic and embedded intervening appliance of the coating on embedded intervening appliance is 3 kinds big. One kind is titanium and hydroxyl apatite (HA) coating, its material uses Ti or Ti-6Al-4V, technology of PVD of applicable of this one coating will come true; Another kind is the cermet coating with more application, through gas phase deposit method comes true, for example TiN is multi-purpose organize sensitive to alloy patient at airframe, zrN can be solved at the same time decrease wear away and alloy is sensitive problem, and DLC has positive result in neck interverbebral disc. This kind of coating has tall hardness, low coefficient of friction and good chemical stability; Still have coat of a kind of polymer, this kind of coating has compatibility of inert, biology, do not stick sticky, reduce dissension, lubricate and wear-resisting function, use PVD technology to come true likewise, for example PTFE, PFA, FEP, PVDF, ETFE, PPS, PAI, PEEK, MOS and Nylon. Embedded the coating that receives appliance to go up with orthopaedics embedded content is given priority to, embedded content material basically is orthopaedics metal and pottery and porcelain, material and organization and organ are antipathic, easy generation wears away. Proper coating, can reduce the airframe harmful response to embedded content, conduce to airframe getting used to embedded content, stimulative skeleton is all round its grow. In the meantime, coating has long-term wearability, can provide long-term protection protective screen to alloy allergy patient. Coating of deposit of alleged gas phase contained PVD coating technology two kinds of technologies, it is deposit of physical gas phase (PVD) coating technology, another is deposit of chemical gas phase (CVD) coating technology. PVD traverses electric field below vacuum environment namely or magnetic field or their put together collaboration is used, solid state material " evaporate " into aeriform condition, be in through making new material deposit with the action of reaction gas the coating technology of workpiece surface. The coating sort of this one technology is all ready, must use data of solid state source, namely target material. Its craft temperature is inferior, be less than 500 ℃ normally. CVD is to use a few special chemical gas, new material deposit arises to be in through chemical reaction below high temperature the coating technology of workpiece surface, the craft temperature that its ask is higher, be more than 1000 ℃ normally, can realize the coating with thicker above of 10 μ M. PVD coating technology undertakes below vacuum environment, include 4 measure: Gas phase is changed, motion, reaction and deposit. Level is changed in gas phase, target material by high-energy particle (electron or ion) concussion, the atom that become loose (or ionic) by from target eject comes out, be changed by gas phase. The particle that athletic process changes for gas phase moves from target material with linear form by plating (base piece) process. Below certain circumstance, coating is comprised by metallic oxide, nitride, carbide and other data. Metallic atom counteracts corresponding gas to make response in mobile process, reaction gas is oxygen, nitrogen and acetylene to wait. Deposit is coating is in base piece the growth that go up process. Reaction grows possibly also here undertake at the same time in the process. The characteristic PVD coating of PVD coating has good corrosion resistance can. TiN and CrN are in 132 ℉ (1 ℉ =0.

556K) temperature and 30psi (1psi=6.

895kPa) after sterilization experiments, the high-pressured sterilization below pressure and gaseous alcohol chemistry can protect stainless steel and have be able to bear or endure high-pressured sterilization function. Next, PVD coating can improve wear-resisting performance, the test makes clear, below the metabolic active force of the water of 37 ℃ and 0~2200N, tiN (9 μ M) embedded content excel does not have femur of plated film Ti-6Al-4V the embedded thing with the Co-Cr-Mo simple material of coating. Embedded content comes in polish of need of plated film around Ra0.

04 μ M. Two metals component is in caustic liquid, move inside the limits that is less than 250 μ M, make stainless steel and film of oxidation of film of titanium alloy component fall off easily, bring about thereby corrode the ion with embedded content to release. Severe case can produce many metallic oxide drossy. PVD coating but very good solve this one jiggle to corrode a problem. Titanium especially easy generation jiggle is corroded. On the vertebral and embedded content that pledges in titanium alloy material, document report observes around its drossy, cause the attention of the long-term effect of embedded to this kind content. Japan already prohibited the Ti-6Al-4V application on vertebral and embedded content. CNC Milling CNC Machining