JPH02275759A - Sliding part material - Google Patents

Abstract

PURPOSE:To increase strength, heat resistance, abrasion resistance and oxidation resistance by sintering a self-sintering carbonaceous powder in which uncarbonized carbon fibers are embedded. CONSTITUTION:The starting pitch is fused with heat at 300 to 400 deg.C and extruded through a nozzle under pressure of an inert gas. The resultant pitch fibers are heated ln an oxidative atmosphere at 150 to 500 deg.C for 0.5 to 5 hours to prepare uncarbonized carbonaceous fibers of 5 to 25mum fiber diameter. 100 pts.wt. of the carbonaceous fibers are surface-treated with 100 to 1,000 pts.-wt. of a binding component-containing material such as tar. Then, 100 pts. wt. of self-sintering carbonaceous powder of less than 30mum particle size such as meso carbon microbeads are mixed with the 2 to 70 pts.wt. of the carbonaceous fibers and compressed with heat at a temperature lower than 500 deg.C under pressure of 1 to 10ton/cm<2> to give a composite material. The composite material is sintered in a non-oxidative atmosphere at 700 to 1,300 deg.C.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention has high strength, excellent heat resistance, wear resistance, and oxidation resistance, and is suitable for use in brake shoes and brake linings for aircraft and race vehicles, high-temperature bearings, etc. Related to sliding members. [Prior Art] Sliding members used as brake materials for aircraft, race vehicles, etc. are particularly required to have heat resistance and wear resistance. In recent years, snow moving members made of carbon fiber-reinforced carbon have been provided as snow moving members to meet this demand. This carbon fiber-reinforced carbon is, for example, carbon fibers that are carbonized or graphitized and subjected to surface treatment such as oxidation treatment, and liquid carbonaceous material as a binder such as tar, pitch, or thermosetting resin. It is manufactured by impregnating the material, firing it in an inert atmosphere, and graphitizing it if necessary (Japanese Unexamined Patent Publication No. 63-206351). [Problems to be Solved by the Invention] However, in the carbon fiber-reinforced carbon produced as described above, a liquid carbonaceous material is used as a binder, and therefore, during the firing process, decomposition of this liquid binder causes The volatile components generated form pores. Therefore, the interfacial adhesion between the reinforcing material and the binder is reduced, and the product has a low density, resulting in poor strength and wear resistance. In order to solve the above problem, conventionally, the porosity has been reduced by repeatedly filling the pores with a liquid impregnating material as a binder and firing the material again. However, despite requiring such a complicated process, the product produced by 1q is still porous.
Moreover, the complexity of the manufacturing process has led to higher costs. The present invention has been made in view of these problems, and it is an object of the present invention to provide a sliding member that has high strength, excellent friction and wear characteristics, and can be manufactured at low cost. [Means for Solving the Problems] One behavior member of the present invention has a predetermined shape, includes uncarbonized carbon fibers, and the unexpanded carbon fibers! It is characterized by consisting of a sintered body obtained by sintering a composite body consisting of a carbonaceous powder having self-sintering properties in which Li fibers are embedded. The shape of the sliding member is not particularly limited, and may be a predetermined shape such as a brake shoe, a brake lining, or a bearing. The above-mentioned uncarbonized carbonaceous fiber is the! of the present invention! It constitutes a reinforcing material for the dynamic member. The raw material for this uncarbonized carbon fiber is P
It can be AN (poly7crylonitrile) type, rayon type, pitch type, etc., and is not particularly limited. Here, the uncarbonized carbonaceous fiber refers to a carbonaceous fiber that has not been subjected to normal carbonization treatment. Specifically, fibers using raw material pitch are fibers as spun or fibers made by infusible spun fibers at a temperature not exceeding 550°C.For polymeric fibers such as PAN, after the decomposition process is completed, graphite It refers to the fibers of Kasuri Moe. This type of carbonaceous fiber can be made, for example, by spinning coal-based or petroleum-based raw material bits (q-pitch W4 fiber), or infusible synthetic fiber M obtained by making it infusible. Spinning and infusibility of this raw material pitch may be carried out according to a conventional method, and the conditions are not particularly limited.Usually, pitch 11iwL is produced by feeding raw material pitch to a spinning machine and heating it to about 300 to 400'C. It can be obtained by extruding it from a nozzle under pressure with an active gas.In addition, such pitch fibers are further heated to 0.5°C at about 150 to 500°C in an oxidizing atmosphere.
The fibers can be made into infusible fibers by holding for about 5 hours. The raw material pitch may be optically isotropic or optically anisotropic. Isotropic uncarbonized carbon fibers obtained from optically isotropic raw material pitch have an amorphous structure that makes them difficult to scrape. The wear resistance of the parts is particularly excellent. In addition, anisotropic uncarbonized carbonaceous fibers obtained from optically anisotropic raw material pitch have a layered structure and are easily peeled off. The sliding member has particularly excellent seizure resistance. The fiber length is not limited to short fibers or long fibers. However, in the case of short fibers, those having a diameter of 0.01 to 5 Qmm can be used. Particularly preferred is one having a diameter of 0.03 to 10 mm in terms of ease of mixing and aspect ratio. If the length is too long, the fibers will become entangled with each other, resulting in poor dispersibility, resulting in poor isotropy of the product properties, and if it is shorter than 0.01 mm, the strength of the product will drop rapidly, which is undesirable. Further, the fiber diameter is preferably about 5 to 25 μm. In addition, these fibers can also be used as nonwoven fabrics or coated fabrics. Preferably, the uncarbonized carbon fibers are further surface-treated with a material containing a caking component such as tar, pitch, or organic polymer to improve compatibility with the binder. This surface treatment consists of 1100 carbon fibers and 100
~1000 IJl1M parts 1'f17) The material containing the caking component is mixed with 7JO, stirred with Ii2, washed with several solvents, and then dried. The tar and pitch used for this surface treatment may be either coal-based or petroleum-based. When using pitch, 140
Tar is more preferable as the treatment material since heating to about ~170'C is required, and coal-based materials are more preferable from the viewpoint of carbonization yield in the subsequent carbonization and graphitization steps. . Examples of the organic polymer include phenol resin, polyvinyl chloride, polyvinyl alcohol, and the like. The organic solvent used for the above-mentioned cleaning may be an aromatic solvent such as toluene or xylene, and the organic solvent may be 100 to 100 parts per 100 parts of the mixture of fibers and adhesive component-containing material.
Add about 1000 parts of single ω and stir and wash. This washing removes light oils containing many volatile components. The uncarbonized carbonaceous fibers that have been washed are dried under conditions such as heating and/or reduced pressure in a non-oxidizing atmosphere such as N2 or argon. The drying process is not limited to these methods as long as the organic solvent used for washing is removed. Furthermore, the surface-treated carbonized carbonaceous fibers that have been dried are subjected to a dispersion treatment, if necessary. However, since the dried fibers may be lumped or aggregated, in such a case, dispersion is carried out by any means such as a conventional powder mill, an atomizer, a bulbarizer, or the like. The carbonaceous powder constitutes the binding material of the sliding member of the present invention. This carbonaceous powder has self-sintering properties and is uncarbonized. The self-sintering carbonaceous powder may be either petroleum-based or coal-based, and specific examples include mesocarbon microbiz, bulk mesophase pulverized products, low-temperature calcined coke crushed crystals, etc. be done. Among these, petroleum-based and coal-based mesocarbon microbeads are preferred from the viewpoint of particle size, uniformity of composition, stability, etc., and coal-based mesocarbon microbeads are more preferred from the viewpoint of carbonization yield. The self-sintering carbonaceous powder has a particle size of 30
Preferably, the thickness is less than μm and the β-resin thickness is about 3 to 50%. The uncarbonized carbonaceous fiber and the self-sintering carbonaceous powder are mixed and molded to form a composite. The mixing means at this time is not particularly limited, but it is preferable to mix uniformly in order to achieve uniform strength and wear resistance. In addition, the blending ratio of carbonaceous powder and carbonaceous fiber is 1
00 weight is about 2 to 70 parts by weight of the latter,
More preferably, the former is 10011 parts to the latter 10 to 5 parts.
Approximately 0,000 copies. The above-mentioned molding can also be carried out by a conventional method, usually 1 to 1
It may be formed into a predetermined shape under pressure of approximately Q t On/Cm2. Alternatively, molding may be performed by CIP method or the like. The molding can be carried out at room temperature or under heating up to about 500 weight in an inert atmosphere. The above composite body is sintered to become the sliding member of the present invention. Note that sintering here refers to carbonizing and solidifying uncarbonized carbon fibers and self-sintering carbonaceous powder by firing at a temperature of about 700 to 1,300°C, and furthermore, sintering this carbonized composite material in a graphitization furnace. It also includes graphitization at about 3000°C. The above-mentioned carbonization is usually carried out at a rate of about 0.1 to 300'C/hour in a non-oxidizing atmosphere from room temperature to 13
It is sufficient to raise the temperature to about 00'C and wait for about 5 to 10 hours at 0°C. The conditions for graphitization are also not particularly limited.
Raise the temperature to about 500-3000'C, and
All you have to do is wait about 10 hours. When graphitized,
Graphite crystals grow sufficiently and are oriented in an orderly manner.
This further improves the density, strength, wear resistance, etc. of the product. [Function] In one behavior member of the present invention, the composite before sintering is made of uncarbonized carbonaceous fibers and uncarbonized carbonaceous powder with self-sintering properties in which uncarbonized carbonaceous fibers are embedded. It consists of Therefore, when this composite is sintered and covered, since the carbonaceous powder as a binder has self-sintering properties, no other liquid carbonaceous material is required as a binder. Since the carbonaceous fibers used as reinforcing materials are uncarbonized, the uncarbonized carbonaceous fibers and the uncarbonized carbonaceous powder having self-sintering properties have the same physical properties when carbonized. properties (strength, shrinkage rate, etc.). Therefore, the interfacial adhesion between these carbonaceous fibers and the carbonaceous powder is improved, and therefore high strength and excellent wear resistance can be obtained. Furthermore, when the surface of the uncarbonized carbonaceous fibers is treated with a material containing a caking component such as tar, pitch, or organic polymer, the wettability of the interface of the carbonaceous fibers increases, and as a result, it can be used as a binder. Since the compatibility with the carbonaceous powder increases, the interfacial adhesion between these carbonaceous fibers and the carbonaceous powder is greatly improved. [Example] The present invention will be described in detail below. (Example 1) Obtained from coal-based optically isotropic pitch by a conventional method,
Thread diameter: 15 μm, thread length: 0.2 to 0.5 mm,
Uncarbonized carbonaceous fibers consisting of three types of infusible fibers of 3 mm and 5 mm were prepared. These three types of unexpanded carbonaceous materials as reinforcing materials i! Each fiber weighs 100 parts, with a center particle size of 7.
After adding 900 μm of self-sintering carbonaceous powder as a binder consisting of coal tar-based mesocarbon microbeads, the resulting mixture was mixed uniformly and
A composite body having a predetermined sliding member shape was obtained by molding at a molding pressure of /Cm2. Next, this composite was heated to 1,000°C at a rate of 150°C/hour in a non-oxidizing atmosphere, held at the same temperature for 1 hour, and fired to form uncarbonized carbon fibers and self-sintering carbon. The solid powder was carbonized and solidified. Then, it was heated to 2800°C at a rate of 500°C/hour in a roughly non-oxidizing atmosphere.
It was graphitized by holding for a minute. As a result, three types of single behavior members of Example 1 were obtained. (Example 2) Obtained from coal-based optically anisotropic pitch by a conventional method,
Thread diameter: 10 μm, thread length: 0.2 to 0.5 mm,
Uncarbonized carbonaceous fibers consisting of three types of infusible fibers of 3 mm and 5 mm were prepared. These three types of uncarbonized carbon substances! a
The three types of sliding members of Example 2 were removed in the same manner as in Example 1 above, except that lti# was used as the reinforcing material. (Comparative Examples 1 to 3) The three types of infusible fibers used as reinforcing materials in Example 1 were carbonized at 550°C and 1000°C, respectively, and
Graphitization was performed at 0'C to prepare carbonized carbon fibers and graphitized carbon fibers. Three sliding members of Comparative Example 1 were obtained in the same manner as in Example 1, except that the carbonized carbonaceous fibers obtained by carbonization at 550° C. were used as reinforcing materials. In addition, three types of sliding members of Comparative Example 2 were obtained in the same manner as in Example 1, except that the carbonized carbon fibers obtained by carbonization at 1000° C. were used as reinforcing materials. In addition, three types of sliding members of Comparative Example 3 were obtained in the same manner as in Example 1 above, except that the graphitized carbonaceous W4 sheet obtained by graphitizing at 2800'C was used as a reinforcing material. . (Comparative Examples 4 to 6) The three types of infusible fibers used as reinforcing materials in Example 2 were carbonized at 550°C and 1000°C, respectively, and
Carbonized carbonaceous fibers and graphitized carbonaceous fibers were prepared by graphitizing at 00°C. Three types of sliding members of Comparative Example 4 were obtained in the same manner as in Example 2, except that the carbonized carbonaceous fiber obtained by carbonization at 550° C. was used as a reinforcing material. In addition, the three types of sliding members of Comparative Example 5 were prepared using the same method as in Example 2, except that the carbonized carbon fiber obtained by carbonization at 1000° C. was used as a reinforcing material. In addition, the above Example 2 except that the graphitized carbonaceous fiber obtained by graphitizing at 2800°C was used as a reinforcing material.
Three types of one-day shift members of Comparative Example 6 were obtained in the same manner as above. (Evaluation 1) The bending strength of each of the sliding members of Examples 1 to 2 and Comparative Examples 1 to 6 was measured. The results are shown in Table 1. As is clear from the table, the behavior members of Examples 1 and 2 using uncarbonized carbon fibers as reinforcing materials are different from those of Comparative Examples 1 to 2 using carbonized or graphitized carbon fibers as reinforcing materials. It can be seen that the bending strength is significantly improved compared to the sliding member No. 6. This is because in 1 and the moving member of Examples 1 and 2, both the carbonaceous fiber as a reinforcing material and the carbonaceous powder as a binding material were uncarbonized, so they were carbonized in the firing process. shows the same degree of shrinkage,
It is thought that the strength was improved due to the increased interfacial adhesion between the carbonaceous fiber and the carbonaceous powder. On the other hand, 1 of Comparative Examples 1 to 6! Since the II dynamic member uses carbonized or graphitized carbonaceous fibers as a reinforcing material, the shrinkage rate during firing is different from that of uncarbonized self-sintering carbonaceous powder as a binding material. For this reason, the interfacial adhesion between the carbonaceous fiber and the carbonaceous powder is considered to be low, resulting in a decrease in strength. (Example 3) Uncarbonized carbonaceous fibers as a reinforcing material consisting of infusible fibers (thread diameter 15 μm, thread length 0.5 mm) obtained by a conventional method from coal-based optically isotropic pitch, and a central grain A self-sintering carbonaceous powder as a binder consisting of coal tar-based mesocarbon microbeads with a diameter of 7 μm was prepared. Then, 30 parts by weight of this uncarbonized carbonaceous fiber and 70 parts by weight of self-sintering carbonaceous powder were uniformly mixed, and the resulting mixture was made into a composite having a 2 tb member shape. Next, this composite was heated to 1000°C at a rate of 150°C/hour in a non-oxidizing atmosphere, and was fired by holding at the same temperature for 1 hour to form uncarbonized carbon fibers and self-sintering properties. The carbonaceous powder was carbonized and consolidated. Then, further heated to 2000°C at a rate of 500'C/hour in a non-oxidizing atmosphere,
It was held for 20 minutes and graphitized. As a result, the density is 1.82 g/crl (true density 2.
10/crl) and a bending strength of 775 Kg/cm2, the sliding member of Example 3 was obtained. (Example 4) 100 weight portions of uncarbonized carbonaceous fibers as a reinforcing material made of infusible fibers (thread diameter 15 μm, thread length 0.5 mm) obtained from coal-based optically isotropic pitch by a conventional method tar 5
Type 00 was added, stirred at room temperature for 15 minutes, filtered, added 500 parts of toluene to a colander, stirred for 30 minutes, filtered out, and dried at 150°C in a N2 stream for 3 hours. Next, to 30 parts by weight of the obtained tar-treated infusible fibers,
Self-sintering carbonaceous powder 7 as a binder consisting of coal tar-based mesocarbon microbeads with a center particle diameter of 7 μm
After adding 0 parts by weight, mix evenly. Then, in the same manner as in Example 1 above, a composite body having a predetermined sliding member shape was prepared, and then carbonized and blackened into black nails). As a result, the density is 1.84Q/cm3 (true density 2.
1 q/cm3) and a bending strength of 930 KO/cm2, the sliding member of Example 4 was obtained. (Evaluation 2) In order to investigate the wear resistance of the sliding members obtained in Examples 3 and 4 above, under oil lubrication, a load of 15 kg, a rotation speed of 16 Or
A 60 minute wear test at pm was performed on an LFW friction wear tester. The results were compared to commercially available carbon fibers obtained by the conventional method of impregnating carbonized carbonaceous fibers with liquid carbonaceous material.
The results are shown in FIG. 1 together with the results for a sliding member manufactured from a carbon composite material and a sliding member manufactured from S45 steel. Note that 5UJ2 was used as the mating material. As is clear from the results shown in FIG. 1, the wear distance of the sliding member of Example 3 was about 200 μm, and the sliding member of Example 4 using uncarbonized carbon fibers surface-treated with tar. The wear distance of the moving member was approximately 65 μm, which was as small as the amount of wear of the sliding member made of 345 steel. On the other hand, the amount of wear of a sliding member made of a conventional carbon-carbon composite material was 1100 μm or more. Therefore, it can be seen that the sliding member according to this example has excellent wear resistance. This is because in the sliding member of Example 3, the carbonaceous fibers as the reinforcing material and the carbonaceous powder as the binding material were both uncarbonized, so when they are carbonized, they have the same degree of physical properties. physical properties (strength, shrinkage rate, etc.)
This is thought to be due to the increased interfacial adhesion between the carbonaceous fiber and the carbonaceous powder. In addition, in the sliding member of Example 4, since uncarbonized carbonaceous fibers that were surface-treated with tar were used, the wettability of the carbonaceous fibers was increased, and this resulted in the interfacial adhesion between the carbonaceous fibers and the carbonaceous powder. This is thought to be due to further improvement in performance. On the other hand, with conventional sliding members made of carbon-carbon composite materials,
The interfacial adhesion between the reinforcing material and the binding material decreases due to pores caused by volatile components generated when the liquid carbonaceous material used as the binding material is fired. In addition, carbonized or graphitized carbon fibers are used as reinforcing materials, and uncarbonized liquid carbonaceous materials are used as binding materials. It is thought that this is because the interfacial adhesion between the reinforcing material and the binding material decreased due to the difference in the bonding material. (Evaluation 3) In addition, - In Examples 3 and 4 above, the seizing nU width when the cart was raised by 25 kg every 2 minutes at an oil-lubricated motor and a rotation speed of iooorpm was Measurements were made using a laboratory-type friction and wear tester.The results are shown in Figure 2 together with the results for sliding members manufactured from conventional carbon-carbon composite materials on the market.The mating material was 5U.
J2 was used. As is clear from the results shown in FIG. 2, the sliding members of Examples 3 and 4 had a higher seizure load and wear due to abrasion than conventional sliding members made of carbon-carbon composite materials. It can be seen that it has excellent characteristics. Incidentally, FIG. 3 shows a reference photograph showing the grain structure 200 times larger in the cross section of the single motion member of Example 4. In the figure, the white part is the carbon fiber, and the black part is the bonded part of the carbon powder. Note that some of the parts that appear black include voids, but the amount of voids is small. In addition, Fig. 4 shows a reference photograph showing the particle structure of 200 (illi) in a cross section of a sliding member made of a conventional heavy membrane carbon-carbon fiber composite material. The cross section of the fiber is shown, and the white rod-shaped part on the left side shows the longitudinal cross section of the carbon fiber. In addition, the black part in the figure shows the voids. (Example 5) The part that looks black in the figure shows the voids. Tar-treated infusible fiber 10.2
To 0.30.40.50 parts by weight, 90.80.70.60.50 parts of self-sintering carbonaceous powder made of coal tar-based mesocarbon microbeads with a center particle diameter of 7 μm were added, respectively, to produce the above example. Five types of i-error members of Example 5 were obtained by the same method as in Example 4. (Example 6) An optically anisotropic pitch was used instead of the optically isotropic pitch of the above Example 4, and the tar-treated infusible 1 fiber was subjected to IJ in the same manner as the above Example 4. The same method as in Example 4 was carried out by adding 90.80.7 parts of self-sintering carbonaceous powder consisting of coal tar-based mesocarbon microbeads with a center particle diameter of 7 μm to 10 and 20.30 parts by weight of infusible fibers, respectively. The three types of sliding members of this Example 6 were evaluated. (Evaluation 4) The density and bending strength of each of the sliding members obtained in Examples 5 and 6 above were measured. Table 2 shows each sliding member of Example 5 using the optically isotropic infusible fiber obtained from the optically isotropic pitch, and the optical anisotropy obtained from the optically anisotropic pitch. In each of the surrounding members of Example 6 using directional infusible fibers, the density and bending strength improved as the amount of added fiber decreased. (Evaluation 5) In order to investigate the wear resistance of each sliding member, under oil lubrication, the load was 15 kg, and the rotation speed was 16 O.
LFW I? wear test for 15 minutes at rpm. It was conducted using an IQ abrasion tester. The results are shown in FIG. Hey,
5UJ2 was used as the mating material. As a result, each sliding member of Example 5 using optically isotropic infusible fibers had better wear resistance than each sliding member of Example 6 using optically anisotropic infusible fibers. It turns out that it is excellent. (iT value 6) 1 surrounding member in which the addition Fd of the optically isotropic infusible fiber of Example 5 is 30 folds and the optically anisotropic infusible m fiber of Example 6 above. The wear resistance of the sliding member, which requires an addition amount of 10 parts by weight, was examined by variously changing the conditions of the wear test in Evaluation 5 above. FIG. 6 shows the results of an investigation conducted under the same conditions as in Evaluation 5 above, except that the test time was varied. Figure 7 shows the results of an investigation conducted under the same conditions as in Evaluation 5 above, while changing the load. FIG. 8 shows the results of an investigation conducted under the same conditions as in Evaluation 5 above, except that the sliding speed was further varied. From these results, the sliding member of Example 5 using optically isotropic infusible fibers has higher durability than the sliding member of Example 6 using optically anisotropic infusible fibers. It can be seen that it has excellent abrasion resistance. In addition, it can be seen that the wear characteristics of the sliding member of Example 5, which uses optically isotropic infusible fibers, are less affected by the sliding speed and test time, and are load-dependent, with the wear length determined by the load. . (Evaluation 7) Regarding each sliding member q in Examples 5 and 6 above,
Under oil lubrication, load is applied every 2 minutes at rotation speed ”+ooorpm.
The seizure load was measured when the load was increased by 5 kCl using a mechanical abrasion testing machine. The results are shown in FIG. 9 together with the value of the friction coefficient when sintering occurred. Note that 5UJ2 was used as the mating material. As a result, the sliding members of Example 6 using optically anisotropic infusible fibers were more durable than the sliding members of Example 5 using optically isotropic infusible fibers. It can be seen that it has excellent seizability. (Evaluation 8) The amount of optically isotropic infusible fiber added in Example 5 was 3.
For the J moving member in which the addition amount of the optically anisotropic infusible fiber of Example 6 was 10 parts by weight, the load was applied every 2 minutes without oil lubrication. Seizure carts were measured using the same testing machine as in Evaluation 7 above when the sliding speed was varied by increasing the temperature by 10 kCl. The results are shown in FIG. It can be seen that this sliding member has better seizure resistance than the sliding member of Example 5 using fibers. [Effects of the Invention] As detailed above, the sliding member of the present invention has a self-sintering property in which the composite before sintering is made of uncarbonized carbon fibers and the uncarbonized carbon fibers are embedded. Since it is composed of uncarbonized carbonaceous powder, when this composite is sintered, the uncarbonized carbonaceous fibers and carbonaceous powder shrink to the same extent and are combined. Therefore, the interfacial adhesion between them is increased, and the strength and wear resistance of the sliding member are improved. Furthermore, the self-sintering carbonaceous powder used as the binding material in the sliding member of the present invention eliminates the need for a binding material made of a liquid carbonaceous material. Therefore, there is no need to repeat impregnation and firing in order to fill the pores generated by using the liquid binder, and the sliding member of the present invention can be manufactured at low cost. In general, when the surface of uncarbonized carbonaceous fibers used as a reinforcing material is treated with a material containing a cohesive component such as tar, pitch, or organic polymer, the wettability of the interface of the carbonaceous fibers increases and this This increases the compatibility with the carbonaceous powder as a binder, further increasing the interfacial adhesion between the carbonaceous fibers and the carbonaceous powder, and greatly improving the strength and abrasion resistance.

[Brief explanation of drawings]

FIG. 1 is a graph showing the results of wear resistance tests on the sliding members of Examples 3 and 4, commercially available sliding members made of conventional carbon-carbon fiber composite materials, and day shift members made of steel. It is. FIG. 2 is a graph showing the seizure test results for the sliding members of Examples 1 and 2 and a commercially available conventional carbon-carbon fiber composite material. FIG. 3 shows a 200 mm cross section of the sliding member of Example 4.
A reference photo showing the double grain structure is shown. Figure 4 shows 1 made of a heavy-layer conventional carbon-carbon fiber composite material.
A reference photograph showing the particle structure 200 times larger in the cross section of the speech and behavior member is shown. FIG. 5 is a graph showing the results of the wear resistance test for the sliding members of Examples 5 and 6. FIG. 6 is a graph showing the results of the abrasion resistance test when the test time was varied for the single behavior members of Examples 5 and 6. FIG. 7 is a graph showing the results of a wear resistance test when the applied load was varied for the sliding members of Examples 5 and 6. FIG. 8 is a graph showing the results of the wear resistance test when the sliding speed was varied for the 18 moving members of Examples 5 and 6. FIG. 9 is a graph showing the results of seizure tests for the sliding members of Examples 5 and 6. FIG. 10 is a graph showing the results of a seizure test when the sliding speed was varied for one speech member of Examples 5 and 6. Patent Applicant Toyota Motor Corporation Osaka Gas Co., Ltd. Agent Patent Attorney Hiroshi Okawa Figure 1 Figure 5 Figure 8 Figure 8 4 Pieces I [11111 Procedure Amendment Form] March 6, 1990 Office of Special Correction Commissioner Yoshi 1) Moon Takeshi 1999 special revision application No. 305281 @ 2, fe Ming's name sliding member 3, supplementary 1F case and relationship (patent applicant) (i location 1 Toyota-cho, Toyota City, Aichi Prefecture) Address Name (320) Representative of TOELI Automatic Chuo Co., Ltd.
Murasaki Sasaki Department 1 1-2, Hirano-cho 4-chome, Chuo-ku, Osaka, Osaka Prefecture @Name (028) Osaka Gas Co., Ltd. Representative: Masafumi Ohnishi 4, Agent Address: 450 Name, Nakamura-ku, Nagoya, Aichi Prefecture Station 3-chome 3-45,
Date of amendment order: February 13, 1990 (Japanese date: February 20, 1990)

[Brief explanation of drawings]

7. Contents of the amendment (1) Delete "Reference" in the first line of page 21 of the specification. (2) Delete "Sukui" in line 8 of page 21 of the Memorandum. (3> Delete "Reference" on page 28, line 11 of the specification. (4) Delete "reference" on page 28, line 14 tr of the specification.

Claims (1)

[Claims] (1) A sintered body having a predetermined shape and obtained by sintering a composite consisting of uncarbonized carbonaceous fibers and carbonaceous powder with self-sintering properties in which the uncarbonized carbonaceous fibers are embedded. A sliding member characterized by comprising: