CN2179788Y - Ultra-high pressure high-temp. synthetic block - Google Patents

Abstract

The utility model relates to an ultra-high pressure high-temperature synthetic block suitable for a hexahedral anvil pressing machine, which has the characteristics that each arris of a cube 1 is provided with a prefab sealing strip 2; each side length 1 of each plane on the utility model is not less than the side length of the top face of a top hammer, and the plane is corresponding to the top face of the top hamper. The width c of the prefab sealing strip 2 is not larger than the width of a chamfering of the inclined plane of the top hammer, and the inclination angle alpha >=130DEG. The utility model has excellent performance property when used for the synthesis of diamond, cubic boron nitride and superhard synthetic materials and products thereof. Compared with a cube synthetic block, the effective volume of a synthesis cavity is enlarged by 20%, and the per unit area yield and the size of the synthetic material can be correspondingly enlarged. The utility model has the advantages of easy controlled synthetic job, more safety, high quality of product and yield rate, saved raw materials and low cost.

Description

Ultra-high pressure high-temp. synthetic block

The utility model relates to the synthetic piece that cubic hinge press carries out the synthetic usefulness of high pressure high temperature, belongs to the high pressure synthesis technical field.

Diamond, cubic boron nitride and composite superhard material excellent performance thereof, of many uses.In their high pressure high temperature was synthetic, pressure field and temperature field in the synthetic chamber had decisive significance, and they depend on the shape and the material of synthetic piece to a considerable extent.Now, China generally uses cubic hinge press synthesizing superhard material, utilizes pressure transmission performance such as pyrophillite and electricity, thermal insulation properties excellent material to make high pressure high temperature pressure transmission sealing medium, makes the synthetic piece of the described square of Chinese patent CN2079082U.During synthetic job, six top hammers of press are six surfaces of the synthetic piece square of extruding simultaneously, moving and the distortion of plastic flow takes place in block materials under compression, wherein a part is squeezed into the slit between the hammer of top, form sealing strip, with high pressure high temperature supporting and the sealing of block as cubic apparatus, set up suitable pressure field and temperature field in the synthetic chamber in block, make the test portion in the synthetic chamber synthesize required superhard material or goods.The synthetic piece of this square is subjected to just to form sealing strip after the high pressure effect in building-up process.Block is taking place that plasticity flows and distortion and when forming sealing strip, synthetic chamber and content thereof significantly are out of shape, thereby cause a series of problems: be contained in conducting steel ring in the synthetic chamber, test portion etc. and be in molten condition, frictional resistance is little, sealability is poor, breaks through the high pressure high temperature sealing easily, blasts, destroy expensive top hammer, cause synthetic failure; Make coupon become the little double horn shape in the big centre of two ends, change its internal resistance, worsen pressure field and temperature field in the synthetic chamber, reduce its dischargeable capacity, cause synthetic effect to descend, temperature control, pressure control difficulty increase.Therefore, the synthetic chamber dischargeable capacity of this synthetic piece is little, and the quality control of synthetic is difficult, per unit area yield is low, size is little, cost is high, yield rate is low, and safety in utilization is relatively poor.

The utility model purpose is according to operation principle and the experimental result of synthetic piece in high pressure high temperature is synthetic, improves its shape and structure, reduces the mobile and distortion of plasticity that synthetic piece takes place under the high pressure high temperature effect, to solve above-mentioned prior art problem.

It is raw material with pressure transmission performances such as pyrophillites with electricity, the good medium of thermal insulation properties that the utility model high pressure high temperature synthesizes piece (Fig. 1), be characterized in: each rib portion of synthetic piece square 1 all has and gives system sealing strip 2, it can be the body that is molded into that is machined to body or powder of piece material, also can be iron chains embedding of square rib portion or bonding and gives the formed body of making sealing strip 2 and making.These synthetic pieces just have sealing strip 2 in its each rib portion before coming into operation.The length of side l on each plane corresponding with top peen face is not less than the top peen face length of side on the synthetic piece, and the width c that gives the system sealing strip is not more than top hammer chamfer width, inclination alpha 〉=130 °.This synthetic piece used carry out high pressure high temperature on the cubic hinge press when synthetic, because of giving system sealing strip 2, the plasticity that block materials is taken place under the high pressure effect flows and is out of shape and reduces greatly.This just makes the synthetic chamber 3 of synthetic piece and the distortion of content thereof significantly reduce, test portion can be under the condition that almost holds its shape sintetics; Pressure field and temperature field in supporting of cubic apparatus high pressure high temperature and sealing and the synthetic chamber 3 have also obviously been improved, thereby improved the synthetic quality, avoid the caused blasts of distortion such as test portion, reduced top hammer and other raw materials consumptions, improved operational security.

Therefore, compared with prior art, the synthetic piece of the utility model high pressure high temperature has excellent serviceability: synthetic chamber dischargeable capacity increases 20% approximately, the per unit area yield height of synthetic, size are big, synthesis pressure and temperature are more easy to control, the quality of synthetic and yield rate height, and top hammer and other raw materials consumptions that synthetic job uses are few, product cost is low, and operational security is good.

Fig. 1 is the half sectional view of the synthetic piece of the utility model.

The high pressure high temperature that 1 one kinds of 600 tonnes of cubic hinge press of embodiment are used synthesizes piece (Fig. 1), have and give system sealing strip 2, it is the body that is molded into of pyrophillite powder, the length of side l=23.5mm on each plane that it is corresponding with top peen face, give the width c=4mm of system sealing strip 2, inclination alpha=140 ° are when the above super-pressure of 5.5GPa that be used for diamond or cubic boron nitride or their composite and goods, when high temperature is synthetic more than 1400 ℃, the effective diameter in its synthetic chamber 3 all can reach 20mm, dischargeable capacity is than the increase approximately 23% of the synthetic piece of square, the corresponding increase of the per unit area yield of synthetic and size, and the quality of sintetics and yield rate height, cost is low, synthesis technique is better, and operation is safer.

Embodiment has the synthetic piece (Fig. 1) of high pressure high temperature that gives system sealing strip 2 for 2 one kinds, is that milling of pyrophillite piece material is processed into body, the length of side l=25mm on each plane that it is corresponding with top peen face, sealing strip width c=8mm, inclination alpha=135 °.When this synthetic piece being used for high pressure high temperature when synthetic, has 1 synthetic piece confers similar advantages with embodiment.

Claims (4)

1, the synthetic piece of a kind of high pressure high temperature that is applicable to cubic hinge press is characterized in that: each rib portion of synthetic piece square (1) all has and gives system sealing strip (2).

2, according to the described synthetic piece of claim 1, it is characterized in that: the length of side l on each plane corresponding with top peen face is not less than the length of side of top peen face on the synthetic piece, and the width c that gives system sealing strip (2) is not more than top hammer chamfer width, inclination alpha 〉=130 °.

3, according to claim 1 or 2 described synthetic pieces, it is characterized in that: synthetic piece is the pressure transmission performance and the body that is molded into of the good dusty material of electricity, thermal insulation properties.

4, according to claim 1 or 2 described synthetic pieces, it is characterized in that: synthetic piece is the pressure transmission performance and the body that is machined to of the good piece material of electricity, thermal insulation properties.