CN107663635A - 一种医用钛合金的表面改性方法 - Google Patents
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Abstract
本发明具体涉及一种医用钛合金的表面改性方法,具体按照将钛合金进行水热处理,在钛合金表面注入银离子,在钛合金的表面涂覆硼粉层,将钛合金进行激光多道扫描,将钛金属的清洗为依次经过打磨、抛光、超声清洗处理的步骤,本发明一种医用钛合金的表面改性方法,能够改善钛合金的抗菌性、生物活性和耐磨性。
Description
技术领域
本发明属于医用钛金属材料技术领域,具体涉及一种医用钛合金的表面改性方法。
背景技术
钛合金具有良好的综合力学性能、生物相容性以及耐腐蚀性。与不锈钢以及钴铬合金等其他常用的硬组织替代材料相比,其质量更轻、机械性能和弹性模量更接近于自然骨骼,因而被广泛的用作人体硬组织替代材料。
但钛合金是生物惰性材料,植入人体后被当做异物排斥,易诱发炎症发生,且在植入过程中有可能带入周围环境中的细菌,从而引发骨髓炎等术后感染,术后感染的发生率为1.6%~37.0%,不仅会延长伤口愈合时间,影响钛合金的使用效果,严重时还可造成肢体伤残,甚至截肢和危及生命;钛合金的耐磨性较差、摩擦系数较高。在使用过程中会导致植入材料使用寿命过短,更换频繁,这样不但会给病人带来不便,还会加重病人的经济负担。同时,磨损产生的碎屑能够导致组织反应,加重病人痛苦。更为严重的是,碎屑还能够通过血液循环进入人体重要器官,危及病人的生命健康。
发明内容
本发明的目的是提供一种医用钛合金的表面改性方法,能够改善钛合金的抗菌性、生物活性和耐磨性。
本发明采用的技术方案是,一种医用钛合金的表面改性方法,具体按照下述步骤进行:
步骤1,将钛合金放入双氧水中,于70℃~100℃进行水热处理;
步骤2,步骤1完成后在钛金合金表面注入银离子;
步骤3,步骤2完成后,将钛合金的表面涂覆硼粉层;
步骤4,步骤3完成后,将钛合金进行激光多道扫描,激光多道扫描过程中的扫描速度为100mm/min~200mm/min,单脉冲能量为 13J~15J,激光多道扫描过程中通入氮气;
步骤5,步骤4完成后,将钛金属的清洗为依次经过打磨、抛光、超声清洗处理。
本发明的特点还在于:
步骤1中双氧水优选质量分数为25%~35%的双氧水,水热处理的时间为36h。
步骤2中,使用等离子浸没离子注入技术在钛金属表面注入银离子。
等离子浸没离子注入技术时在钛金属表面注入银离子时,本底真空度为4×10-3Pa~5×10-3Pa,注入电压为20kV~30kV,脉宽为200~ 300μs,频率为10Hz~12Hz,银注入时间为2h~3h。
步骤3中硼粉层的厚度为80μm~100μm。
步骤4中激光多道扫描过程中扫描的速度为100mm/min~200mm/min,单脉冲能量为13~15J。
步骤4激光多道扫描过程中通入氮气。
本发明的有益效果在于:
本发明一种医用钛合金的表面改性方法,能够改善钛合金的抗菌性、生物活性和耐磨性。
具体实施方式
下面根据具体实施方式对本发明进行详细说明。
一种医用钛合金的表面改性方法,具体按照下述步骤进行:
步骤1,将钛合金放入质量分数为25%~35%的双氧水中,于 70℃~100℃进行水热处理36h;
步骤2,步骤1完成后使用等离子浸没离子注入技术在钛金合金表面注入银离子;等离子浸没离子注入技术时在钛金属表面注入银离子,本底真空度为4×10-3Pa~5×10- 3Pa,注入电压为20kV~30kV,脉宽为200~300μs,频率为10Hz~12Hz,银注入时间为2h~3h;
步骤3,步骤2完成后,将钛合金的表面涂覆80~100μm厚的硼粉层;
步骤4,步骤3完成后,将钛合金进行激光多道扫描,激光多道扫描速度为100mm/min~200mm/min,单脉冲能量为13J~15J,激光多道扫描时通入氮气;
步骤5,步骤4完成后,将钛金属的清洗为依次经过打磨、抛光、超声清洗处理。
步骤1进行水热处理后,钛金属表面被不同形貌的纳米二氧化钛所覆盖,步骤2注入银离子后二氧化钛层表面分布着粒径大小为10nm 左右、以单质形态存在的银纳米粒子。纳米二氧化钛层能够赋予钛金属成骨能力,而银纳米粒子的存在则能显著地改善钛金属的抗菌能力。步骤3钛合金表面硼粉层涂层硬度高且耐磨性好:步骤4由于采用了激光合金化技术,在涂层中原位合成了具有高硬度的钛硼化合物,因此本发明的钛合金具有较高的硬度和耐磨性。硼粉层涂层具有良好的生物相容性,因此钛合金具有较好的生物相容性。
本发明一种医用钛合金的表面改性方法,能够改善钛合金的抗菌性、生物活性和耐磨性。
实施例1
一种医用钛合金的表面改性方法,具体按照下述步骤进行:
步骤1,将钛合金放入质量分数为25%的双氧水中,于70℃进行水热处理36h;
步骤2,步骤1完成后使用等离子浸没离子注入技术在钛金合金表面注入银离子;等离子浸没离子注入技术时在钛金属表面注入银离子,本底真空度为4×10-3Pa,注入电压为20kV,脉宽为200,频率为 10Hz,银注入时间为2h;
步骤3,步骤2完成后,将钛合金的表面涂覆80μm厚的硼粉层;
步骤4,步骤3完成后,将钛合金进行激光多道扫描,激光多道扫描速度为100mm/min,单脉冲能量为13J,激光多道扫描时通入氮气;
步骤5,步骤4完成后,将钛金属的清洗为依次经过打磨、抛光、超声清洗处理。
实施例2
一种医用钛合金的表面改性方法,具体按照下述步骤进行:
步骤1,将钛合金放入质量分数为25%~35%的双氧水中,于100℃进行水热处理36h;
步骤2,步骤1完成后使用等离子浸没离子注入技术在钛金合金表面注入银离子;等离子浸没离子注入技术时在钛金属表面注入银离子,本底真空度为5×10-3Pa,注入电压为30kV,脉宽为300μs,频率为12Hz,银注入时间为3h;
步骤3,步骤2完成后,将钛合金的表面涂覆100μm厚的硼粉层;
步骤4,步骤3完成后,将钛合金进行激光多道扫描,激光多道扫描速度为200mm/min,单脉冲能量为15J,激光多道扫描时通入氮气;
步骤5,步骤4完成后,将钛金属的清洗为依次经过打磨、抛光、超声清洗处理。
实施例3
一种医用钛合金的表面改性方法,具体按照下述步骤进行:
步骤1,将钛合金放入质量分数为30%的双氧水中,于90℃进行水热处理36h;
步骤2,步骤1完成后使用等离子浸没离子注入技术在钛金合金表面注入银离子;等离子浸没离子注入技术时在钛金属表面注入银离子,本底真空度为4.5×10-3Pa,注入电压为25kV,脉宽为250μs,频率为1112Hz,银注入时间为2.5h;
步骤3,步骤2完成后,将钛合金的表面涂覆90μm厚的硼粉层;
步骤4,步骤3完成后,将钛合金进行激光多道扫描,激光多道扫描速度为150mm/min,单脉冲能量为14J,激光多道扫描时通入氮气;
步骤5,步骤4完成后,将钛金属的清洗为依次经过打磨、抛光、超声清洗处理。
实施例4
一种医用钛合金的表面改性方法,具体按照下述步骤进行:
步骤1,将钛合金放入质量分数为28%的双氧水中,于75℃进行水热处理36h;
步骤2,步骤1完成后使用等离子浸没离子注入技术在钛金合金表面注入银离子;等离子浸没离子注入技术时在钛金属表面注入银离子,本底真空度为4.2×10-3Pa,注入电压为22kV,脉宽为220μs,频率为10.5Hz,银注入时间为2.2h;
步骤3,步骤2完成后,将钛合金的表面涂覆85μm厚的硼粉层;
步骤4,步骤3完成后,将钛合金进行激光多道扫描,激光多道扫描速度为120mm/min,单脉冲能量为13.5J,激光多道扫描时通入氮气;
步骤5,步骤4完成后,将钛金属的清洗为依次经过打磨、抛光、超声清洗处理。
实施例5
一种医用钛合金的表面改性方法,具体按照下述步骤进行:
步骤1,将钛合金放入质量分数为32%的双氧水中,于90℃进行水热处理36h;
步骤2,步骤1完成后使用等离子浸没离子注入技术在钛金合金表面注入银离子;等离子浸没离子注入技术时在钛金属表面注入银离子,本底真空度为4.8×10-3Pa,注入电压为28kV,脉宽为280μs,频率为11.5Hz,银注入时间为2.8h;
步骤3,步骤2完成后,将钛合金的表面涂覆95μm厚的硼粉层;
步骤4,步骤3完成后,将钛合金进行激光多道扫描,激光多道扫描速度为180mm/min,单脉冲能量为14.5J,激光多道扫描时通入氮气;
步骤5,步骤4完成后,将钛金属的清洗为依次经过打磨、抛光、超声清洗处理。
Claims (7)
1.一种医用钛合金的表面改性方法,其特征在于,具体按照下述步骤进行:
步骤1,将钛合金放入双氧水中,于70℃~100℃进行水热处理;
步骤2,步骤1完成后在钛金合金表面注入银离子;
步骤3,步骤2完成后,将钛合金的表面涂覆硼粉层;
步骤4,步骤3完成后,将钛合金进行激光多道扫描,激光多道扫描过程中的扫描速度为100mm/min~200mm/min,单脉冲能量为13J~15J,激光多道扫描过程中通入氮气;
步骤5,步骤4完成后,将钛金属的清洗为依次经过打磨、抛光、超声清洗处理。
2.根据权利要求1所述的一种医用钛合金的表面改性方法,其特征在于,所述步骤1中双氧水优选质量分数为25%~35%的双氧水,水热处理的时间为36h。
3.根据权利要求1所述的一种医用钛合金的表面改性方法,其特征在于,所述步骤2中,使用等离子浸没离子注入技术在钛金属表面注入银离子。
4.根据权利要求3所述的一种医用钛合金的表面改性方法,其特征在于,进行等离子浸没离子注入技术时在钛金属表面注入银离子时,本底真空度为4×10-3Pa~5×10-3Pa,注入电压为20kV~30kV,脉宽为200~300μs,频率为10Hz~12Hz,银注入时间为2h~3h。
5.根据权利要求1所述的一种医用钛合金的表面改性方法,其特征在于,所述步骤3中硼粉层的厚度为80μm~100μm。
6.根据权利要求1所述的一种医用钛合金的表面改性方法,其特征在于,所述步骤4激光多道扫描过程中的扫描速度为100~200mm/min,单脉冲能量为13~15J。
7.根据权利要求1所述的一种医用钛合金的表面改性方法,其特征在于,所述步骤4激光多道扫描过程中通入氮气。
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