阅读说明：本技术 一种具有表面磁性镀层金刚石及其镀覆方法 (Diamond with surface magnetic coating and coating method thereof ) 是由 乔金勇 朱珠 汪康静 朱晓凯 于 2020-06-18 设计创作，主要内容包括：本发明属于金刚石表面处理技术领域,是一种具有表面磁性镀层金刚石及其镀覆方法；一种金刚石表面镀覆方法:它包括对金刚石的预处理步骤,所述的预处理步骤是将金刚石放置在电火花放电室中,所述的放电电极是钢丝,使金刚石表面有电火花形成金属颗粒和凹坑,这个过程是电火花过程,然后对金刚石进行膜的镀覆。具有表面磁性镀层金刚石,包括金刚石本体,所述的金刚石本体具有外表面,外表面具有一层包覆的磁性镀层,所述的外表面上分布有点状的铁质颗粒,所述的磁性镀层还包覆着铁质颗粒；这样的镀覆方法具有形成的金刚石表面磁性镀层更稳定,磁性更强的优点；这样的金刚石具有表面磁性镀层更稳定,磁性更强的优点。(The invention belongs to the technical field of diamond surface treatment, and relates to a diamond with a surface magnetic coating and a coating method thereof; a method for coating diamond surface includes such steps as pretreating diamond by putting it in spark discharge chamber, using steel wire as discharge electrode to spark the diamond surface to form metal particles and pits, and coating film on diamond. The diamond with the surface magnetic coating comprises a diamond body, wherein the diamond body is provided with an outer surface, the outer surface is provided with a coated magnetic coating, punctiform iron particles are distributed on the outer surface, and the magnetic coating is also coated with the iron particles; the plating method has the advantages that the formed magnetic plating layer on the surface of the diamond is more stable and has stronger magnetism; the diamond has the advantages of more stable surface magnetic coating and stronger magnetism.)

1. A method for coating diamond surface includes such steps as pretreating diamond by putting it in spark discharge chamber, using steel wire as discharge electrode to spark the diamond surface to form metal particles and pits, and coating film on diamond.

2. The diamond surface plating method according to claim 1, wherein: the diamond film plating includes: firstly, depositing a nano rare earth material and a nickel-phosphorus alloy on the surface of a diamond together by adopting a chemical nickel plating mode to form a nano rare earth-nickel-phosphorus alloy composite magnetic coating; and step two, coating the nickel-phosphorus alloy on the nano rare earth-nickel-phosphorus alloy composite magnetic coating by adopting a chemical nickel plating mode to form the nickel-phosphorus alloy protective coating, wherein the processes are coating processes.

3. The diamond surface plating method according to claim 2, wherein: the method also comprises the step of coating a layer of ferric sulfate on the surface of the diamond before the step of pretreating the diamond, wherein the step is a step of coating the ferric sulfate layer.

4. A diamond surface coating method according to claim 3, wherein: also comprises a diamond cleaning process after the electric spark process and before the plating process.

5. The diamond surface plating method according to claim 4, wherein: the cleaning process is to clean with acid with pH =2-3 and soak for 3-5 hours.

6. The diamond with the surface magnetic coating comprises a diamond body, wherein the diamond body is provided with an outer surface, and the outer surface is provided with a coated magnetic coating, and the diamond is characterized in that: the outer surface is distributed with point-shaped iron particles, and the magnetic coating is also coated with the iron particles.

7. The diamond with surface magnetic coating of claim 6, which is characterized in that: the outer surface of the diamond body is also provided with a pit, and the magnetic coating coats the pit.

8. The diamond with surface magnetic coating of claim 7, which is characterized in that: the magnetic coating coats the iron particles and the outside of the pits is smooth.

Technical Field

The invention belongs to the technical field of diamond surface treatment, and particularly relates to a diamond with a surface magnetic coating and a coating method thereof.

Background

In the publication No. CN106894075B and patent No. 201710176265.0, a diamond surface magnetic coating and a coating method thereof are disclosed, wherein the coating method of the diamond surface magnetic coating comprises the following steps: firstly, depositing a nano rare earth material and a nickel-phosphorus alloy on the surface of a diamond together by adopting a chemical nickel plating mode to form a nano rare earth-nickel-phosphorus alloy composite magnetic coating; and secondly, coating a nickel-phosphorus alloy on the nano rare earth-nickel-phosphorus alloy composite magnetic coating by adopting a chemical nickel plating mode to form the nickel-phosphorus alloy protective coating. The diamond particles prepared by the method have high magnetism and corrosion resistance. The coating is applied to the production process of the electroplated diamond wire, and has excellent sanding property and long service life.

The diamond used in the method is not treated before chemical nickel plating, the obtained diamond surface magnetic coating still has an unstable phenomenon, and the magnetism cannot meet higher requirements.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a diamond with a surface magnetic coating and a coating method thereof.

The technical scheme of the diamond surface plating method is realized as follows: a diamond surface coating method comprises the following steps:

the method comprises the step of pretreating the diamond, wherein the step of pretreating is to place the diamond in an electric spark discharge chamber, a discharge electrode is a steel wire, so that metal particles and pits are formed on the surface of the diamond through electric sparks, the process is an electric spark process, and then the diamond is coated with a film.

The diamond film plating includes: firstly, depositing a nano rare earth material and a nickel-phosphorus alloy on the surface of a diamond together by adopting a chemical nickel plating mode to form a nano rare earth-nickel-phosphorus alloy composite magnetic coating; and step two, coating the nickel-phosphorus alloy on the nano rare earth-nickel-phosphorus alloy composite magnetic coating by adopting a chemical nickel plating mode to form the nickel-phosphorus alloy protective coating, wherein the processes are coating processes.

Preferably, the step of pretreating the diamond further comprises the step of coating a layer of ferric sulfate on the surface of the diamond, wherein the step is a process of coating a ferric sulfate layer.

Preferably, the method further comprises a diamond cleaning process after the electric spark process and before the plating process.

Preferably, the washing process is carried out by washing with acid having pH =2-3 and soaking for 3-5 hours.

The technical scheme of the diamond with the surface magnetic coating is realized as follows: the diamond with the surface magnetic coating comprises a diamond body, wherein the diamond body is provided with an outer surface, and the outer surface is provided with a coated magnetic coating, and the diamond is characterized in that: the outer surface is distributed with point-shaped iron particles, and the magnetic coating is also coated with the iron particles.

Furthermore, the outer surface of the diamond body is also provided with a pit, and the magnetic coating coats the pit.

Furthermore, the magnetic coating coats the iron particles and the outside of the pits is smooth.

The invention has the beneficial effects that: the plating method has the advantages that the formed magnetic plating layer on the surface of the diamond is more stable and has stronger magnetism; the diamond has the advantages of more stable surface magnetic coating and stronger magnetism.

Drawings

Fig. 1 is a schematic view of the structure of a diamond of the present invention.

Wherein: 1. diamond body 2, magnetic coating 3, iron granule 4, pit.

Detailed Description

The invention is further described with reference to the following figures and examples.