CN106894075A - 金刚石表面磁性镀层及其镀覆方法 - Google Patents

金刚石表面磁性镀层及其镀覆方法 Download PDF

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CN106894075A
CN106894075A CN201710176265.0A CN201710176265A CN106894075A CN 106894075 A CN106894075 A CN 106894075A CN 201710176265 A CN201710176265 A CN 201710176265A CN 106894075 A CN106894075 A CN 106894075A
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邹余耀
田晓庆
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Jiangsu Sanchao Diamond Tools Co ltd
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Nanjing Sanchao Advanced Materials Co Ltd
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Abstract

本发明属于金刚石表面处理技术领域，具体涉及一种金刚石表面磁性镀层及其镀覆方法。所述金刚石表面磁性镀层的镀覆方法包括如下步骤：步骤一、采用化学镀镍的方式，将纳米稀土材料随镍磷合金共沉积在金刚石表面形成所述纳米稀土‑镍磷合金复合磁性镀层；步骤二、采用化学镀镍的方式，将镍磷合金包覆于所述纳米稀土‑镍磷合金复合磁性镀层上形成所述镍磷合金保护镀层。通过本发明方法制备的金刚石颗粒，具有较高的磁性，同时也具有较高的耐腐蚀性。应用在电镀金刚线生产过程中，具有优良的上砂性和使用寿命。

Description

金刚石表面磁性镀层及其镀覆方法
技术领域
本发明属于金刚石表面处理技术领域，具体涉及一种金刚石表面磁性镀层及其镀覆方法。
背景技术
在电镀金刚线行业，金刚线的上砂属于关键工序。此磁性上砂工序中，金刚石的磁性、耐电腐蚀性能，对上砂情况有着决定性的作用。
现有技术中，普通镀覆金刚石颗粒，磁性弱，耐点腐蚀性差，在电镀液中，上砂困难，并且很容易被腐蚀掉镀层，失去磁性，从而会影响金刚线的上砂效率，上砂成本也较高。
发明内容
为了解决上述技术问题，本发明的目的在于提供一种利于提高金刚石颗粒的磁性以及耐电腐蚀性能、使其具有优良的上砂性和使用寿命的金刚石表面磁性镀层。
为实现上述技术目的，本发明采用以下的技术方案：
金刚石表面磁性镀层，包括内层和外层，所述内层为纳米稀土-镍磷合金复合磁性镀层；所述外层为包覆于所述纳米稀土-镍磷合金复合磁性镀层上的镍磷合金保护镀层。
本发明还提供了如上所述的金刚石表面磁性镀层的镀覆方法，包括如下步骤：
步骤一、采用化学镀镍的方式，将纳米稀土材料随镍磷合金共沉积在金刚石表面形成所述纳米稀土-镍磷合金复合磁性镀层；
步骤二、采用化学镀镍的方式，将镍磷合金包覆于所述纳米稀土-镍磷合金复合磁性镀层上形成所述镍磷合金保护镀层。
其中，步骤一中，镀覆方法如下：
(a)活化液、第一镀液配置；
(b)金刚石活化：将金刚石加入活化液中，加热至80～85℃，搅拌至无气泡产生，活化停止；
(c)纳米稀土-镍磷合金复合磁性镀层镀覆：将活化后金刚砂加入一定体积纯水中，加入纳米稀土材料，加热至70～80℃，缓慢加入第一镀液，并保持pH至4.0～4.4，至无气泡产生，镀覆停止；
(d)经沉淀、过滤、烘干，得到活化后金刚石颗粒；
其中，步骤二中，镀覆方法如下：
(a)第二镀液配置；
(b)镍磷合金保护镀层镀覆：将活化后金刚石颗粒加入一定体积纯水中，加热至70～80℃，缓慢加入第二镀液，实际镀液用量根据需要的镀层厚度调整，并保持pH至4.0～4.4，至无气泡产生，镀覆停止；
(c)经沉淀、过滤、烘干，得到磁性镀层金刚石颗粒。
作为优选，所述活化液配方为：氯化钯0.1～0.3g/L，盐酸2～4mL/L，次磷酸钠100～150g/L，十二烷磺酸钠0.001～0.005g/L。
作为优选，所述第一镀液配方为：氨基磺酸镍25～40ml/L，次磷酸钠50～70g/L，丁二酸10～15g/L，苹果酸5～8g/L，乳酸2～4mL/L。
作为优选，所述第二镀液配方为：氨基磺酸镍25～40ml/L，次磷酸钠30～40g/L，丁二酸8～12g/L，苹果酸5～8g/L，乳酸2～4mL/L。
作为优选，步骤一或步骤二中，采用体积比为1:1氨水溶液保持pH。
由于采用上述技术方案，本发明具有至少以下有益效果：
(1)通过纳米稀土材料的加入，利用共沉积方法，使金刚石表面形成的镀层具有特殊的磁性，同样金刚石添加量的情况下，上砂率得到很大提高，这能够有效的提高金刚线的上砂效率，节约上砂成本，更能进一步提高电镀金刚线的生产效率。
(2)在特殊镀层表面镀覆保护层，可以避免纳米稀土材料与外部环境的直接接触，同时提高镀层的耐腐蚀性，大大提高了使用寿命。
通过上述方法制备的金刚石颗粒，具有较高的磁性，同时也具有较高的耐腐蚀性。应用在电镀金刚线生产过程中，具有优良的上砂性和使用寿命。
具体实施方式
下面结合实施例，进一步阐述本发明。在下面的详细描述中，只通过说明的方式描述了本发明的某些示范性实施例。毋庸置疑，本领域的普通技术人员可以认识到，在不偏离本发明的精神和范围的情况下，可以用各种不同的方式对所描述的实施例进行修正。因此，描述在本质上是说明性的，而不是用于限制权利要求的保护范围。
实施例1
金刚石表面磁性镀层，包括内层和外层，所述内层为纳米稀土-镍磷合金复合磁性镀层；所述外层为包覆于所述纳米稀土-镍磷合金复合磁性镀层上的镍磷合金保护镀层。
所述纳米稀土-镍磷合金复合磁性镀层的镀覆方法如下：
(a)活化液、第一镀液配置：
所述活化液配方为：氯化钯0.1g/L，盐酸2mL/L，次磷酸钠100g/L，十二烷磺酸钠0.001g/L；
所述第一镀液配方为：氨基磺酸镍25ml/L，次磷酸钠50g/L，丁二酸10g/L，苹果酸5g/L，乳酸2mL/L；
(b)金刚石活化：
将金刚石加入活化液中，加热至80～85℃，搅拌至无气泡产生，活化停止；
(c)纳米稀土-镍磷合金复合磁性镀层镀覆：
将活化后金刚砂500～600g加入1～2L纯水中，加入纳米稀土材料5～10g/L，加热至70～80℃，缓慢加入第一镀液2～2.5L，并采用1:1氨水溶液保持pH至4.0～4.4，至无气泡产生，镀覆停止；
(d)经沉淀、过滤、烘干，得到活化后金刚石颗粒；
所述镍磷合金保护镀层的镀覆方法如下：
(a)第二镀液配置：
所述第二镀液配方为：氨基磺酸镍25ml/L，次磷酸钠30g/L，丁二酸8g/L，苹果酸5g/L，乳酸2mL/L；
(b)镍磷合金保护镀层镀覆：
将活化后金刚石颗粒500～600g加入2～4L纯水中，加热至70～80℃，缓慢加入第二镀液1.5～2.5L(实际镀液用量根据需要的镀层厚度调整)，并采用1:1氨水溶液保持pH至4.0～4.4，至无气泡产生，镀覆停止；
(c)经沉淀、过滤、烘干，得到磁性镀层金刚石颗粒。
实施例2
金刚石表面磁性镀层，包括内层和外层，所述内层为纳米稀土-镍磷合金复合磁性镀层；所述外层为包覆于所述纳米稀土-镍磷合金复合磁性镀层上的镍磷合金保护镀层。
所述纳米稀土-镍磷合金复合磁性镀层的镀覆方法如下：
(a)活化液、第一镀液配置：
所述活化液配方为：氯化钯0.3g/L，盐酸4mL/L，次磷酸钠150g/L，十二烷磺酸钠0.005g/L；
所述第一镀液配方为：氨基磺酸镍40ml/L，次磷酸钠70g/L，丁二酸15g/L，苹果酸8g/L，乳酸4mL/L；
(b)金刚石活化：
将金刚石加入活化液中，加热至80～85℃，搅拌至无气泡产生，活化停止；
(c)纳米稀土-镍磷合金复合磁性镀层镀覆：
将活化后金刚砂500～600g加入1～2L纯水中，加入纳米稀土材料5～10g/L，加热至70～80℃，缓慢加入第一镀液2～2.5L，并采用1:1氨水溶液保持pH至4.0～4.4，至无气泡产生，镀覆停止；
(d)经沉淀、过滤、烘干，得到活化后金刚石颗粒；
所述镍磷合金保护镀层的镀覆方法如下：
(a)第二镀液配置：
所述第二镀液配方为：氨基磺酸镍40ml/L，次磷酸钠40g/L，丁二酸12g/L，苹果酸8g/L，乳酸4mL/L；
(b)镍磷合金保护镀层镀覆：
将活化后金刚石颗粒500～600g加入2～4L纯水中，加热至70～80℃，缓慢加入第二镀液1.5～2.5L(实际镀液用量根据需要的镀层厚度调整)，并采用1:1氨水溶液保持pH至4.0～4.4，至无气泡产生，镀覆停止；
(c)经沉淀、过滤、烘干，得到磁性镀层金刚石颗粒。
实验证明，通过上述方法制备的金刚石颗粒，具有较高的磁性，同时也具有较高的耐腐蚀性，应用在电镀金刚线生产过程中，具有优良的上砂性和使用寿命。
以上所述仅为本发明示意性的具体实施方式，并非用以限定本发明的范围。任何本领域内的技术人员，在不脱离本发明的构思和原则的前提下所作出的等同变化与修改，均应属于本发明保护的范围。

Claims (7)

1.金刚石表面磁性镀层，包括内层和外层，其特征在于：
所述内层为纳米稀土-镍磷合金复合磁性镀层；
所述外层为包覆于所述纳米稀土-镍磷合金复合磁性镀层上的镍磷合金保护镀层。
2.如权利要求1所述的金刚石表面磁性镀层的镀覆方法，其特征在于，包括如下步骤：
步骤一、采用化学镀镍的方式，将纳米稀土材料随镍磷合金共沉积在金刚石表面形成所述纳米稀土-镍磷合金复合磁性镀层；
步骤二、采用化学镀镍的方式，将镍磷合金包覆于所述纳米稀土-镍磷合金复合磁性镀层上形成所述镍磷合金保护镀层。
3.如权利要求2所述的金刚石表面磁性镀层的镀覆方法，其特征在于：
步骤一中，镀覆方法如下：
(a)活化液、第一镀液配置；
(b)金刚石活化：将金刚石加入活化液中，加热至80～85℃，搅拌至无气泡产生，活化停止；
(c)纳米稀土-镍磷合金复合磁性镀层镀覆：将活化后金刚砂加入纯水中，加入纳米稀土材料，加热至70～80℃，缓慢加入第一镀液，并保持pH至4.0～4.4，至无气泡产生，镀覆停止；
(d)经沉淀、过滤、烘干，得到活化后金刚石颗粒；
步骤二中，镀覆方法如下：
(a)第二镀液配置；
(b)镍磷合金保护镀层镀覆：将活化后金刚石颗粒加入纯水中，加热至70～80℃，缓慢加入第二镀液，并保持pH至4.0～4.4，至无气泡产生，镀覆停止；
(c)经沉淀、过滤、烘干，得到磁性镀层金刚石颗粒。
4.如权利要求3所述的金刚石表面磁性镀层的镀覆方法，其特征在于，所述活化液配方为：氯化钯0.1～0.3g/L，盐酸2～4mL/L，次磷酸钠100～150g/L，十二烷磺酸钠0.001～0.005g/L。
5.如权利要求3所述的金刚石表面磁性镀层的镀覆方法，其特征在于，所述第一镀液配方为：氨基磺酸镍25～40ml/L，次磷酸钠50～70g/L，丁二酸10～15g/L，苹果酸5～8g/L，乳酸2～4mL/L。
6.如权利要求3所述的金刚石表面磁性镀层的镀覆方法，其特征在于，所述第二镀液配方为：氨基磺酸镍25～40ml/L，次磷酸钠30～40g/L，丁二酸8～12g/L，苹果酸5～8g/L，乳酸2～4mL/L。
7.如权利要求3所述的金刚石表面磁性镀层的镀覆方法，其特征在于：步骤一或步骤二中，采用体积比为1:1氨水溶液保持pH。
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